Bichur I think he meant look at Koalo's first post at the top of the page.

I have had the same problem for the past few day's sometimes a reboot will clear other times I have to change the theme, apply and then reboot. I have been through the clean install and have tried most of the other suggestions on this page. I just rebuit my computer the other day from scratch so I thought I had an install problem, but if others are having the same trouble then maybe it isn't me.
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.
(ViewSonic VX924) 1 is attached to NVIDIA GeForce 8800 GTS
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