Bug ID 6 says that sometimes the outlines of empty piles don't get drawn. I know this happens, because I've seen it myself. But it doesn't seem to happen very often, and I don't know how to make it happen.
If I can't make it happen, I can't study it to see why it happens, and I can't test it to be sure it's fixed.
So I need your help. If any of you hardy beta testers out there can give me any clue about what might trigger this problem, please let me know! I'd like to get this one fixed and off the bug list.