I installed netbeans as I typically do and have for the past 3 years, to /usr/local/netbeans-version. Then I started it up as my normal user (who isn't root). I saw that it didn't start so I started it from the command line, and I found that there was a permission denied exception. 

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>Log Session: Wednesday, May 30, 2012 5:23:30 PM EDT
>System Info: 
  Product Version         = NetBeans IDE 7.2 Beta (Build 201205031832) (#41d3eb3428ac)
  Operating System        = Linux version 3.0.0-20-generic running on amd64
  Java; VM; Vendor        = 1.6.0_26; Java HotSpot(TM) 64-Bit Server VM 20.1-b02; Sun Microsystems Inc.
  Runtime                 = Java(TM) SE Runtime Environment 1.6.0_26-b03
  Java Home               = /usr/lib/jvm/java-6-sun-1.6.0.26/jre
  System Locale; Encoding = en_US (nb); UTF-8
  Home Directory          = /home/zach
  Current Directory       = /home/zach/Downloads
  User Directory          = /home/zach/.netbeans/7.2beta
  Cache Directory         = /home/zach/.cache/netbeans/7.2beta
  Installation            = /usr/local/netbeans-7.2beta/nb
                            /usr/local/netbeans-7.2beta/ergonomics
                            /usr/local/netbeans-7.2beta/ide
                            /usr/local/netbeans-7.2beta/java
                            /usr/local/netbeans-7.2beta/apisupport
                            /usr/local/netbeans-7.2beta/webcommon
                            /usr/local/netbeans-7.2beta/websvccommon
                            /usr/local/netbeans-7.2beta/enterprise
                            /usr/local/netbeans-7.2beta/mobility
                            /usr/local/netbeans-7.2beta/profiler
                            /usr/local/netbeans-7.2beta/php
                            /usr/local/netbeans-7.2beta/harness
                            /usr/local/netbeans-7.2beta/cnd
                            /usr/local/netbeans-7.2beta/dlight
                            /usr/local/netbeans-7.2beta/groovy
                            /usr/local/netbeans-7.2beta/javafx
                            /usr/local/netbeans-7.2beta/platform
  Boot & Ext. Classpath   = /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/resources.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/rt.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/sunrsasign.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/jsse.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/jce.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/charsets.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/modules/jdk.boot.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/classes:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/ext/sunpkcs11.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/ext/localedata.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/ext/sunjce_provider.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/ext/dnsns.jar
  Application Classpath   = /usr/local/netbeans-7.2beta/platform/lib/boot.jar:/usr/local/netbeans-7.2beta/platform/lib/org-openide-modules.jar:/usr/local/netbeans-7.2beta/platform/lib/org-openide-util.jar:/usr/local/netbeans-7.2beta/platform/lib/org-openide-util-lookup.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/boot_ja.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/boot_pt_BR.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/boot_ru.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/boot_zh_CN.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/org-openide-modules_ja.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/org-openide-modules_pt_BR.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/org-openide-modules_ru.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/org-openide-modules_zh_CN.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/org-openide-util_ja.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/org-openide-util-lookup_ja.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/org-openide-util-lookup_pt_BR.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/org-openide-util-lookup_ru.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/org-openide-util-lookup_zh_CN.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/org-openide-util_pt_BR.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/org-openide-util_ru.jar:/usr/local/netbeans-7.2beta/platform/lib/locale/org-openide-util_zh_CN.jar:/usr/lib/jvm/java-6-sun/lib/dt.jar:/usr/lib/jvm/java-6-sun/lib/tools.jar
  Startup Classpath       = /usr/local/netbeans-7.2beta/platform/core/org-openide-filesystems.jar:/usr/local/netbeans-7.2beta/platform/core/core.jar:/usr/local/netbeans-7.2beta/platform/core/locale/core_zh_CN.jar:/usr/local/netbeans-7.2beta/platform/core/locale/org-openide-filesystems_pt_BR.jar:/usr/local/netbeans-7.2beta/platform/core/locale/core_ja.jar:/usr/local/netbeans-7.2beta/platform/core/locale/org-openide-filesystems_zh_CN.jar:/usr/local/netbeans-7.2beta/platform/core/locale/core_ru.jar:/usr/local/netbeans-7.2beta/platform/core/locale/org-openide-filesystems_ja.jar:/usr/local/netbeans-7.2beta/platform/core/locale/org-openide-filesystems_ru.jar:/usr/local/netbeans-7.2beta/platform/core/locale/core_pt_BR.jar:/usr/local/netbeans-7.2beta/nb/core/org-netbeans-upgrader.jar:/usr/local/netbeans-7.2beta/nb/core/locale/core_nb_pt_BR.jar:/usr/local/netbeans-7.2beta/nb/core/locale/org-netbeans-upgrader_zh_CN.jar:/usr/local/netbeans-7.2beta/nb/core/locale/core_nb_ja.jar:/usr/local/netbeans-7.2beta/nb/core/locale/org-netbeans-upgrader_ru.jar:/usr/local/netbeans-7.2beta/nb/core/locale/org-netbeans-upgrader_pt_BR.jar:/usr/local/netbeans-7.2beta/nb/core/locale/core_nb.jar:/usr/local/netbeans-7.2beta/nb/core/locale/core_nb_zh_CN.jar:/usr/local/netbeans-7.2beta/nb/core/locale/core_nb_ru.jar:/usr/local/netbeans-7.2beta/nb/core/locale/org-netbeans-upgrader_ja.jar
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WARNING [org.netbeans.core.modules]: the modules [org.netbeans.modules.db.sql.editor, org.netbeans.modules.editor.structure, org.netbeans.modules.xml.text] use org.netbeans.modules.editor.deprecated.pre65formatting which is deprecated.
java.lang.Error: Failed to create temporary file for jnidispatch library: java.io.IOException: Permission denied
	at com.sun.jna.Native.loadNativeLibraryFromJar(Native.java:762)
	at com.sun.jna.Native.loadNativeLibrary(Native.java:697)
	at com.sun.jna.Native.<clinit>(Native.java:127)
	at org.netbeans.modules.masterfs.watcher.linux.LinuxNotifier.<init>(LinuxNotifier.java:103)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at java.lang.Class.newInstance0(Class.java:355)
	at java.lang.Class.newInstance(Class.java:308)
	at org.openide.util.lookup.implspi.SharedClassObjectBridge.newInstance(SharedClassObjectBridge.java:64)
	at org.openide.util.lookup.MetaInfServicesLookup$P.getInstance(MetaInfServicesLookup.java:519)
	at org.netbeans.modules.masterfs.watcher.Watcher.getNotifierForPlatform(Watcher.java:414)
	at org.netbeans.modules.masterfs.watcher.Watcher.<init>(Watcher.java:85)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at java.lang.Class.newInstance0(Class.java:355)
	at java.lang.Class.newInstance(Class.java:308)
	at org.openide.util.lookup.implspi.SharedClassObjectBridge.newInstance(SharedClassObjectBridge.java:64)
	at org.openide.util.lookup.MetaInfServicesLookup$P.getInstance(MetaInfServicesLookup.java:519)
	at org.openide.util.lookup.AbstractLookup$R.allInstances(AbstractLookup.java:1041)
	at org.openide.util.lookup.AbstractLookup$R.allInstances(AbstractLookup.java:1021)
	at org.openide.util.lookup.ProxyLookup$LazyCollection.computeSingleResult(ProxyLookup.java:1249)
	at org.openide.util.lookup.ProxyLookup$LazyCollection.computeDelegate(ProxyLookup.java:1091)
	at org.openide.util.lookup.ProxyLookup$LazyCollection.access$900(ProxyLookup.java:1021)
	at org.openide.util.lookup.ProxyLookup$LazyCollection$1.hasNext(ProxyLookup.java:1215)
	at org.netbeans.modules.masterfs.filebasedfs.FileBasedFileSystem$StatusImpl.resultChanged(FileBasedFileSystem.java:305)
	at org.netbeans.modules.masterfs.filebasedfs.FileBasedFileSystem$StatusImpl.<init>(FileBasedFileSystem.java:271)
	at org.netbeans.modules.masterfs.filebasedfs.FileBasedFileSystem.<init>(FileBasedFileSystem.java:81)
	at org.netbeans.modules.masterfs.filebasedfs.FileBasedFileSystem.<clinit>(FileBasedFileSystem.java:79)
	at org.netbeans.modules.masterfs.filebasedfs.FileBasedURLMapper.getFileObjects(FileBasedURLMapper.java:138)
	at org.netbeans.modules.masterfs.MasterURLMapper.getFileObjects(MasterURLMapper.java:65)
	at org.openide.filesystems.URLMapper.findFileObject(URLMapper.java:212)
	at org.netbeans.modules.project.ui.LazyProject.getProjectDirectory(LazyProject.java:92)
	at org.netbeans.modules.project.ui.OpenProjectList$RecentProjectList$4.run(OpenProjectList.java:1537)
	at org.netbeans.modules.project.ui.OpenProjectList$RecentProjectList$4.run(OpenProjectList.java:1505)
	at org.openide.util.Mutex.readAccess(Mutex.java:290)
	at org.netbeans.modules.project.ui.OpenProjectList$RecentProjectList.load(OpenProjectList.java:1505)
	at org.netbeans.modules.project.ui.OpenProjectList$2.run(OpenProjectList.java:215)
	at org.netbeans.modules.project.ui.OpenProjectList$2.run(OpenProjectList.java:208)
	at org.openide.util.Mutex.readAccess(Mutex.java:290)
	at org.netbeans.modules.project.ui.OpenProjectList.getDefault(OpenProjectList.java:208)
	at org.netbeans.modules.project.ui.OpenProjectsTrampolineImpl.addPropertyChangeListenerAPI(OpenProjectsTrampolineImpl.java:95)
	at org.netbeans.api.project.ui.OpenProjects.addPropertyChangeListener(OpenProjects.java:287)
	at org.netbeans.api.project.ui.OpenProjects.<init>(OpenProjects.java:98)
	at org.netbeans.api.project.ui.OpenProjects.<clinit>(OpenProjects.java:90)
	at org.netbeans.modules.ide.ergonomics.fod.FeatureProjectFactory.<init>(FeatureProjectFactory.java:107)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at java.lang.Class.newInstance0(Class.java:355)
	at java.lang.Class.newInstance(Class.java:308)
	at org.openide.util.lookup.implspi.SharedClassObjectBridge.newInstance(SharedClassObjectBridge.java:64)
	at org.openide.util.lookup.MetaInfServicesLookup$P.getInstance(MetaInfServicesLookup.java:519)
	at org.openide.util.lookup.AbstractLookup$R.allInstances(AbstractLookup.java:1041)
	at org.openide.util.lookup.AbstractLookup$R.allInstances(AbstractLookup.java:1021)
	at org.openide.util.lookup.ProxyLookup$LazyCollection.computeSingleResult(ProxyLookup.java:1249)
	at org.openide.util.lookup.ProxyLookup$LazyCollection.computeDelegate(ProxyLookup.java:1091)
	at org.openide.util.lookup.ProxyLookup$LazyCollection.access$900(ProxyLookup.java:1021)
	at org.openide.util.lookup.ProxyLookup$LazyCollection$1.hasNext(ProxyLookup.java:1215)
	at org.netbeans.modules.ide.ergonomics.fod.FoDLayersProvider.noAdditionalProjects(FoDLayersProvider.java:154)
	at org.netbeans.modules.ide.ergonomics.fod.FoDLayersProvider.registerLayers(FoDLayersProvider.java:96)
	at org.openide.filesystems.Repository.findLayers(Repository.java:231)
	at org.netbeans.core.startup.NbRepository.additionalLayers(NbRepository.java:182)
	at org.netbeans.core.startup.layers.ModuleLayeredFileSystem.setURLs(ModuleLayeredFileSystem.java:245)
	at org.netbeans.core.startup.layers.ModuleLayeredFileSystem.addURLs(ModuleLayeredFileSystem.java:283)
	at org.netbeans.core.startup.NbInstaller.loadLayers(NbInstaller.java:617)
	at org.netbeans.core.startup.NbInstaller.load(NbInstaller.java:345)
	at org.netbeans.ModuleManager.enable(ModuleManager.java:1163)
	at org.netbeans.ModuleManager.enable(ModuleManager.java:986)
	at org.netbeans.core.startup.ModuleList.installNew(ModuleList.java:340)
	at org.netbeans.core.startup.ModuleList.trigger(ModuleList.java:276)
	at org.netbeans.core.startup.ModuleSystem.restore(ModuleSystem.java:295)
	at org.netbeans.core.startup.Main.getModuleSystem(Main.java:169)
	at org.netbeans.core.startup.Main.start(Main.java:305)
	at org.netbeans.core.startup.TopThreadGroup.run(TopThreadGroup.java:123)
	at java.lang.Thread.run(Thread.java:662)