Building RC1 on opensuse 11.2 usingMonodevelop 2.2 on mono 2.4.2.3

Hi,
I just downloaded RC1 and tried to build using monodevelop . I get an error

/home/alan/Development/opentk-1.0.0-rc1/Source/Build/Properties/Resources.resx: Error: Error: Invalid ResX input.
Position: Line 129, Column 5.
Inner exception: Could not find file "/home/alan/Development/opentk-1.0.0-rc1/Source/Build/Resources/OpenTK.Prebuild.xml".
(OpenTK.Build)

I started with mono Build.exe vs in a terminal before running monodevelop, then mono Build.exe clean followed by mono Build.exe vs9 same problem above in each case.
Then tried mono Build.exe all but this crashed with error

Patching paths in prebuild output

Unhandled Exception: Microsoft.Build.BuildEngine.InvalidProjectFileException: /home/alan/Development/opentk-1.0.0-rc1/OpenTK.sln: Text node cannot appear in this state. Line 1, position 1. ---> System.Xml.XmlException: Text node cannot appear in this state. Line 1, position 1.

Is there something else I should have done to create Prebuild.xml?

Alan