It appears that the bug OS-specific, and didn't affect the Mac version. I don't think it was caused by the fact that you had a development build, though, so I suspect that it exists in LDView 4.1. To be honest, I don't know why it didn't cause patterns to disappear in screenshots, since the root cause that showed up with random colors should have affected patterns also.
In any event, here is another development build that should fix the problem:
http://www.halibut.com/~tcobbs/ldraw/pri...101-36.zip
In any event, here is another development build that should fix the problem:
http://www.halibut.com/~tcobbs/ldraw/pri...101-36.zip