OpenSuse 12.3, MonoDevelop 4.0.12 - no source code visible, no code visible in CodeView, gray windows instead of code

After compiling MonoDevelop from clean source no code is visible in the editor - instead a clean, gray window is displayed. To resolve the issue just export an appropriate env variable:

export OXYGEN_DISABLE_INNER_SHADOWS_HACK=1

and then run monodevelop as you'd normally do:

$ monodevelop