@jeff I have on a few resent occasions seen that blocks and OpenGL shadows don’t play nicely together. If I select the blocks and explode them then it works as expected, and if I copy-paste the parts to a new document then it also works as expected.
I can send you a file if you have time to take a look. And I can help out on the bugtracking if you like.
Agree, this has also been my reason for not using them earlier.
But now I am working on Skydrive and Dropbox, and that forces me to think small, so blocks and linked files are natural solutions.
BTW: I have not seen these kinds of issues with linked files.
These resent issues might be with mirrored blocks. I can check that out.
Mirror had a tendency to mess things up earlier too.