Patch Set 1:

I tried this on a newly started workbench and had no selection yet when clicking CMD-# (on Mac) and this way I hit


eclipse.buildId=I20110613-1736
java.version=1.6.0_26
java.vendor=Apple Inc.
BootLoader constants: OS=macosx, ARCH=x86_64, WS=cocoa, NL=en_US
Framework arguments:  -product org.eclipse.platform.ide
Command-line arguments:  -product org.eclipse.platform.ide -data /Users/d029788/Documents/workspace/egit/../runtime-EGit -dev file:/Users/d029788/Documents/workspace/egit/.metadata/.plugins/org.eclipse.pde.core/EGit/dev.properties -os macosx -ws cocoa -arch x86_64 -consoleLog

Error
Thu Sep 22 23:03:01 CEST 2011
Unhandled event loop exception

java.lang.ArrayIndexOutOfBoundsException: 0
	at org.eclipse.egit.ui.internal.actions.CommitActionHandler.execute(CommitActionHandler.java:47)
	at org.eclipse.egit.ui.internal.actions.RepositoryAction.run(RepositoryAction.java:86)
	at org.eclipse.ui.internal.handlers.ActionDelegateHandlerProxy.execute(ActionDelegateHandlerProxy.java:289)
	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
	at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:468)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:786)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:885)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:567)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:508)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:123)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1069)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4124)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1465)
	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1494)
	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1490)
	at org.eclipse.swt.widgets.Text.sendKeyEvent(Text.java:1518)
	at org.eclipse.swt.widgets.Control.doCommandBySelector(Control.java:1051)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5560)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:220)
	at org.eclipse.swt.widgets.Widget.superKeyDown(Widget.java:1895)
	at org.eclipse.swt.widgets.Widget.keyDown(Widget.java:1076)
	at org.eclipse.swt.widgets.Control.keyDown(Control.java:2358)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5470)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:220)
	at org.eclipse.swt.widgets.Widget.windowSendEvent(Widget.java:2092)
	at org.eclipse.swt.widgets.Shell.windowSendEvent(Shell.java:2255)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5532)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Display.applicationSendEvent(Display.java:4986)
	at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5135)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
	at org.eclipse.swt.internal.cocoa.NSApplication.sendEvent(NSApplication.java:128)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3607)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1386)

when trying the same with a selection e.g. in the package explorer it works properly