[Wil Badger]

You are not creating loose ends with what your changing. It just some files could be getting overlapped. One cab file and another cab file could both have the same manila file. So say you install a clock and it changes the background behind the clock to a transparent one. Then you go and load a transparency cab. They could both have the file for the clock background. Though how they were made transparent might be different. This can be what causes issues. Did the person who made one completely remove all the graphics from the file or did he simple keep the graphic but just made it transparent or did they leave it there and left it just barely visible? They could have also put a glass style to it. This can cause things like shadow lines.