There is a bug in the shadow drawing when SystemWindows use round corners.
The shadow gets darker on the round edge, look at attached jpg.

Karl
-------------- next part --------------
A non-text attachment was scrubbed...
Name: cornerrounder.jpg
Type: image/jpeg
Size: 3756 bytes
Desc: Unknown Document
Url : http://lists.squeakfoundation.org/pipermail/squeak-dev/attachments/20030804/565a0c3d/cornerrounder.jpg