I installed Netbeans 5.5beta.  I then used the Update Manager to install the
Subversion plugin.  I restarted Netbeans (to allow updates to complete).  I
selected the Subversion menu, then Checkout.  In the "Repository URL" bar, I
highlighted all of the text (originally "file:") and typed http://dip.  At this
point (as I was typing the next character) an exception was thrown.  The stack
trace is below.

Some more info on my system/setup:
NetBeans 5.5 Beta (Build 200605090801, Pack 2006.05.09)
Windows XP version 5.1 running on x86
Sun JVM 1.5.0_06
Java HotSpot Client VM 1.5.0_06-b05
en_US(nb) locale

java.lang.NullPointerException
	at
org.netbeans.modules.subversion.config.SvnConfigFiles.copyConfigFileToIDEConfigDir(SvnConfigFiles.java:371)
	at
org.netbeans.modules.subversion.config.SvnConfigFiles.<init>(SvnConfigFiles.java:61)
	at
org.netbeans.modules.subversion.config.SvnConfigFiles.getInstance(SvnConfigFiles.java:73)
	at
org.netbeans.modules.subversion.ui.repository.Repository.onSelectedRepositoryChange(Repository.java:335)
	at
org.netbeans.modules.subversion.ui.repository.Repository.access$700(Repository.java:53)
[catch] at
org.netbeans.modules.subversion.ui.repository.Repository$3.run(Repository.java:266)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
	at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:153)
	at java.awt.Dialog$1.run(Dialog.java:515)
	at java.awt.Dialog.show(Dialog.java:536)
	at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:810)
	at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:853)
	at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:841)
	at org.openide.util.Mutex.doEventAccess(Mutex.java:1172)
	at org.openide.util.Mutex.readAccess(Mutex.java:209)
	at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:826)
	at org.netbeans.core.NotifyException.updateState(NotifyException.java:297)
	at org.netbeans.core.NotifyException.access$400(NotifyException.java:55)
	at org.netbeans.core.NotifyException$2.run(NotifyException.java:228)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
	at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:153)
	at java.awt.Dialog$1.run(Dialog.java:515)
	at java.awt.Dialog.show(Dialog.java:536)
	at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:810)
	at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:853)
	at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:841)
	at org.openide.util.Mutex.doEventAccess(Mutex.java:1172)
	at org.openide.util.Mutex.readAccess(Mutex.java:209)
	at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:826)
	at java.awt.Component.show(Component.java:1300)
	at java.awt.Component.setVisible(Component.java:1253)
	at
org.netbeans.modules.subversion.ui.wizards.CheckoutWizard.show(CheckoutWizard.java:51)
	at
org.netbeans.modules.subversion.ui.checkout.CheckoutAction.performAction(CheckoutAction.java:39)
	at
org.openide.util.actions.CallableSystemAction$1.run(CallableSystemAction.java:94)
	at
org.netbeans.modules.openide.util.ActionsBridge.doPerformAction(ActionsBridge.java:47)
	at
org.openide.util.actions.CallableSystemAction.actionPerformed(CallableSystemAction.java:90)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:302)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1000)
	at
javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1041)
	at java.awt.Component.processMouseEvent(Component.java:5488)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
	at java.awt.Component.processEvent(Component.java:5253)
	at java.awt.Container.processEvent(Container.java:1966)
	at java.awt.Component.dispatchEventImpl(Component.java:3955)
	at java.awt.Container.dispatchEventImpl(Container.java:2024)
	at java.awt.Component.dispatchEvent(Component.java:3803)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
	at java.awt.Container.dispatchEventImpl(Container.java:2010)
	at java.awt.Window.dispatchEventImpl(Window.java:1774)
	at java.awt.Component.dispatchEvent(Component.java:3803)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
	at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)