Just booted the IDE, reported manually since automatic reporting is broken:

java.lang.NullPointerException: The webModule parameter cannot be null
        at org.openide.util.Parameters.notNull(Parameters.java:89)
        at org.netbeans.modules.web.jsf.api.facesmodel.JSFVersion.forWebModule(JSFVersion.java:129)
        at org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport.parseLibraries(FaceletsLibrarySupport.java:412)
        at org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport._findLibraries(FaceletsLibrarySupport.java:322)
        at org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport.findLibraries(FaceletsLibrarySupport.java:267)
        at org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport.getLibraries(FaceletsLibrarySupport.java:181)
        at org.netbeans.modules.web.jsf.editor.JsfSupportImpl.getLibrary(JsfSupportImpl.java:228)
        at org.netbeans.modules.web.jsf.editor.JsfPageMetadataProvider.getMetadataMap(JsfPageMetadataProvider.java:97)
        at org.netbeans.modules.web.common.api.WebPageMetadata.getMetadata(WebPageMetadata.java:70)
        at org.netbeans.modules.html.editor.HtmlErrorFilter.getWebPageMimeType(HtmlErrorFilter.java:170)
        at org.netbeans.modules.html.editor.HtmlErrorFilter.isErrorCheckingEnabledForMimetype(HtmlErrorFilter.java:157)
        at org.netbeans.modules.html.editor.hints.HtmlHintsProvider.computeErrors(HtmlHintsProvider.java:182)
        at org.netbeans.modules.html.editor.HtmlErrorFilter.filter(HtmlErrorFilter.java:99)
        at org.netbeans.modules.csl.core.ErrorFilterQuery.getFilteredErrors(ErrorFilterQuery.java:76)
        at org.netbeans.modules.csl.core.TLIndexerFactory$TLIndexer.index(TLIndexerFactory.java:247)
        at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$3.run(Indexable.java:248)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:266)
        at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:246)
[catch] at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:2873)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:2893)
        at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:586)
        at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:155)
        at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:139)
        at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.
java:201)
        at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.
java:198)
        at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.pr
iorityIO(FileChangedManager.java:176)
        at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO
(ProvidedExtensions.java:360)
        at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.j
ava:74)
        at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProce
ssor.java:198)
        at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.ja
va:106)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.ind
exEmbedding(RepositoryUpdater.java:2816)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doI
ndex(RepositoryUpdater.java:2575)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.acc
ess$1200(RepositoryUpdater.java:2040)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.r
un(RepositoryUpdater.java:2364)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.r
un(RepositoryUpdater.java:2362)
        at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTr
ansaction(TaskCache.java:544)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.ind
ex(RepositoryUpdater.java:2362)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Abstract
RootsWork.scanSource(RepositoryUpdater.java:5034)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Abstract
RootsWork.scanSources(RepositoryUpdater.java:4746)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RefreshW
ork.getDone(RepositoryUpdater.java:4107)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doT
heWork(RepositoryUpdater.java:3059)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._ru
n(RepositoryUpdater.java:5476)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.acc
ess$4600(RepositoryUpdater.java:5142)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3$1
.run(RepositoryUpdater.java:5401)
        at org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performS
can(RunWhenScanFinishedSupport.java:96)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3.c
all(RepositoryUpdater.java:5397)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3.c
all(RepositoryUpdater.java:5393)
        at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.pr
iorityIO(FileChangedManager.java:176)
        at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO
(ProvidedExtensions.java:360)
        at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.j
ava:74)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run
(RepositoryUpdater.java:5393)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:47
1)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432
)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java
:2044)

Product Version = NetBeans IDE Dev (Build 20130408-f130a8702c06)
Operating System = Windows 7 version 6.1 running on amd64
Java; VM; Vendor = 1.7.0_07
Runtime = Java HotSpot(TM) 64-Bit Server VM 23.3-b01