nLite 1.4.9.3 (.NET2 test app) starts up, but buttons are messed up

gigaherz, ThFabba
confirmed, beginning with r71398 .NET2 setup succeeds without major issues - very impressive!

I can even launch my .Net2-testapp "nLite 1.4.9.3" for the very first time within ros now.

Unfortunately we do not get too far.
1.) Buttons are messed up, painting-wise
2.) Unhandled exception
exception-box can be seen in ros-r71399-nLiteStartup.png and contains a ton of useful debug-info, I just can't get all text out.

Since I can continue to use the app even after exception, the button thingy is more important.