>I tried it, but parent grid is still effected (it's not completely lost as before, but it bounces around; definitely not something I could leave in a production app.). It's also a lot slower than my existing method.
>
>I wasn't so much looking for a work around (I have it working already) as much as an explanation as to what's happening.

I understand. I'm not sure I have more ideas at the moment. May be at night I'll try to search. The feeling I have is that I've seen this problem in foxclub Russian forum.