I also have a problem with Flash CS3 (not the same problem as in the first post) my problem is that horizontal lines appear when you scroll up (
see image), it mostly happens when you click and drag the scrollbar up. That said I did find a way fix the problem without completely disabling themes for flash by enabling "Disable scrollbars for this app" for Flash.exe.

Click ImageCode: info
WindowBlinds version : WindowBlinds 6.0 (build 36 x86)
WindowBlinds is installed correctly on this PC
WindowBlinds appears to be activated on this PC
Your machine supports per pixel borders on WindowBlinds skins.
(Dell 2007WFP (Digital)) 1 is attached to NVIDIA GeForce 8800 GTX
Wblind.dll 2007/10/08 13:04:20
Wbsrv.dll 2007/10/04 17:58:04
Wbconfig.exe 2007/10/04 17:58:33
Wbload.exe 2007/09/27 17:47:44
Wbhelp.dll 2007/08/27 11:54:07
Wbui.dll 2007/09/24 19:08:06
Tray.dll 2007/09/12 17:58:21
Screen.exe 2007/10/04 17:58:24