[MonoDevelop] weird behavior using MonoDevelop 3.0.1 on OS X 10.7.3

[lightxx]

ok. today i installed the mono MDK 2.10.8, then i installed MonoDevelop 3.0.1
i ran my first hello world solution, everything worked as expected.

then MonoDevelop / Xamarin updated to 2.10.9.

ever since, no matter what i do in MonoDevelop, i get tons of exceptions
(see below). nothing works any more. i can't open files, solutions, nothing.

i tried to completely uninstall the mono MDK using the shell script and
complete removed MonoDevelop and reinstalled everything, to no avail. it
simple ceased working.

any ideas?
http://mono.1490590.n4.nabble.com/file/n4643230/Screen_Shot_2012-05-17_at_17.16.29.png 

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System.Xml.XmlException: Referenced character was not allowed in XML.
Normalization is True, checkCharacters = True  Line 4, position 46.
  at Mono.Xml2.XmlTextReader.ReadCharacterReference () [0x001a5] in
/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.XML/System.Xml/XmlTextReader.cs:1777 
  at Mono.Xml2.XmlTextReader.ReadReference (Boolean ignoreEntityReferences)
[0x00015] in
/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.XML/System.Xml/XmlTextReader.cs:1728 
  at Mono.Xml2.XmlTextReader.ReadText (Boolean notWhitespace) [0x00048] in
/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.XML/System.Xml/XmlTextReader.cs:1663 
  at Mono.Xml2.XmlTextReader.ReadContent () [0x0015c] in
/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.XML/System.Xml/XmlTextReader.cs:1359 
  at Mono.Xml2.XmlTextReader.Read () [0x00141] in
/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.XML/System.Xml/XmlTextReader.cs:626 
  at System.Xml.XmlTextReader.Read () [0x0006b] in
/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.XML/System.Xml/XmlTextReader2.cs:564 
  at System.Xml.XmlReader.ReadElementString () [0x00040] in
/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.XML/System.Xml/XmlReader.cs:584 
  at MonoDevelop.Ide.Desktop.RecentItem.Read (System.Xml.XmlReader reader)
[0x0013b] in
/Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Desktop/RecentItem.cs:231 
  at MonoDevelop.Ide.Desktop.RecentFileStorage.ReadStore
(System.IO.FileStream file) [0x0004f] in
/Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Desktop/RecentFileStorage.cs:237 
  at MonoDevelop.Ide.Desktop.RecentFileStorage.ModifyStore (System.Func`2
modify) [0x0000c] in
/Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Desktop/RecentFileStorage.cs:214 
  at MonoDevelop.Ide.Desktop.RecentFileStorage.RemoveMissingFiles
(System.String[] groups) [0x0001e] in
/Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Desktop/RecentFileStorage.cs:164 
  at MonoDevelop.Ide.Desktop.FdoRecentFiles..ctor (System.String
storageFile) [0x00012] in
/Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Desktop/RecentOpen.cs:56 
  at MonoDevelop.Ide.Desktop.FdoRecentFiles..ctor () [0x00000] in <filename
unknown>:0 
  at MonoDevelop.Ide.Desktop.PlatformService.CreateRecentFilesProvider ()
[0x00000] in
/Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Desktop/PlatformService.cs:331 
  at MonoDevelop.Ide.Desktop.PlatformService.get_RecentFiles () [0x00000] in
/Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Desktop/PlatformService.cs:337 
  at MonoDevelop.Ide.DesktopService.get_RecentFiles () [0x00000] in
/Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide/DesktopService.cs:176 
  at MonoDevelop.Ide.RootWorkspace.BackgroundLoadWorkspace (IProgressMonitor
monitor, System.String filename, Boolean loadPreferences) [0x00129] in
/Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide/RootWorkspace.cs:562 

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