CF w/4.2 image

I was able to build in the Compact Framework component into a 4.1 image
(w/the latest RTM CF version) using platform builder CE.NET
I got remote debugging working with Visual Studio .NET and was able to build
and deploy some simple C#
programs and they worked.
When I build a 4.2 image with Compact Framework the same simple programs do
not run (even a simple
"hello world" C# pgm crashes). I get a "Fatal Application Error" Exception:
0xC0000005.

I believe 4.2 came with the released version of CF and as far as I can tell
there has been no QFE's
that pertain to CF.
Any ideas?