[MonoDevelop] MonoDevelop 2.2b crashes on launch under Mac 10.6.1

[Casemon]

Using MonoFramework-2.4.2.3_6.macos10.novell.x86 which is supposed to have
the needed dependencies... but no go. Or is there some dependency that is
not installed?

Been wrestling this for over a week... jumping through many hoops, but still
no go.

Have tried replacing the last line in MonoDevelop launch script with the OSX
version line suggested here on the forums, but nothing. 

Have also tried deleting ~/.config/MonoDevelop, but still crashes
immediately.

Seems strange more people are not getting this error; have searched here,
and far & wide, tried a few seemingly related solutions, but still nothing!

Any ideas? 

Console says: 
2009-11-3 15:21:39 	[0x0-0x23023].com.ximian.monodevelop[288]	Starting
MonoDevelop
2009-11-3 15:21:39 	[0x0-0x23023].com.ximian.monodevelop[288]	   Starting
MonoDevelop
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]
System.NullReferenceException: Object reference not set to an instance of an
object
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	  at
MonoDevelop.Core.Runtime.Initialize (Boolean updateAddinRegistry) [0x00092]
in
/Users/michael/Mono/monodevelop/main/src/core/MonoDevelop.Core/MonoDevelop.Core/Runtime.cs:76 
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	WARNING
[2009-11-03 15:21:40Z]:
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	 MonoDevelop
failed to start. Rebuilding addins registry.
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	Folders
checked (4 ms)
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	Starting
MonoDevelop
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	   Starting
MonoDevelop
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]
System.NullReferenceException: Object reference not set to an instance of an
object
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	  at
MonoDevelop.Core.Runtime.Initialize (Boolean updateAddinRegistry) [0x00092]
in
/Users/michael/Mono/monodevelop/main/src/core/MonoDevelop.Core/MonoDevelop.Core/Runtime.cs:76 
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	FATAL ERROR
[2009-11-03 15:21:40Z]: MonoDevelop failed to start. Some of the assemblies
required to run MonoDevelop (for example gtk-sharp, gnome-sharp or
gtkhtml-sharp) may not be properly installed in the GAC.
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]
System.InvalidOperationException: Extension node not found in path:
/MonoDevelop/Core/PlatformService
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	  at
Mono.Addins.ExtensionContext.GetExtensionObjects (System.String path,
System.Type arrayElementType, Boolean reuseCachedInstance) [0x00028] in
/tmp/monobuild/build/BUILD/mono-addins-0.4/Mono.Addins/Mono.Addins/ExtensionContext.cs:280 
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	  at
Mono.Addins.ExtensionContext.GetExtensionObjects (System.String path)
[0x00000] in
/tmp/monobuild/build/BUILD/mono-addins-0.4/Mono.Addins/Mono.Addins/ExtensionContext.cs:261 
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	  at
Mono.Addins.AddinManager.GetExtensionObjects (System.String path) [0x00005]
in
/tmp/monobuild/build/BUILD/mono-addins-0.4/Mono.Addins/Mono.Addins/AddinManager.cs:236 
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	  at
MonoDevelop.Core.Gui.DesktopService.Initialize () [0x0000b] in
/Users/michael/Mono/monodevelop/main/src/core/MonoDevelop.Core.Gui/MonoDevelop.Core.Gui/DesktopService.cs:41 
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	  at
MonoDevelop.Ide.Gui.IdeStartup.Run (System.String[] args) [0x00135] in
/Users/michael/Mono/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Gui/IdeStartup.cs:120 
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	  at
MonoDevelop.Startup.MonoDevelopMain.Main (System.String[] args) [0x00017] in
/Users/michael/Mono/monodevelop/main/src/core/MonoDevelop.Startup/MonoDevelop.Startup/MonoDevelopMain.cs:24 
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]
/Applications/@/Dev/MonoDevelop.app/Contents/MacOS/monodevelop: line 99:
exec: -p: invalid option
2009-11-3 15:21:40 	[0x0-0x23023].com.ximian.monodevelop[288]	exec: usage:
exec [-cl] [-a name] file [redirection ...]
2009-11-3 15:21:40 	com.apple.launchd.peruser.502[162]
([0x0-0x23023].com.ximian.monodevelop[288]) Exited with exit code: 2
-- 
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