Hi Neil,
Have you been able to isolate the problem with those two skins I linked to? I had hoped updating to the new Windowblinds beta would resolve this problem, but unfortunately it hasn't.
Something I noticed only yesterday is that sometimes if one of those two aero skins is run first, other skins will display similar problems until a system restart. I assume reloading start8 would do the trick, too, but the problem does not always occur, so that I cannot currently try out other possible solutions.
Many thanks in advance. 
- Swiveller
