I have kinda the same problem, but the taskbar get grey, when i try to apply a Aero Theme, not with a theme like Sublime by Stardock.
And I have marked the "I want to use Aero Frames but keep the rest of the skin". I didn't work when didn't mark this option.
Sys info:
Your computer has a Windows Experience Index base score of 5.5
Your Windows Graphics Experience score is 6.7
WindowBlinds version : WindowBlinds 7.0 (build 230 - Windows 7 Edition)
WindowBlinds is installed correctly on this PC
WindowBlinds appears to be activated on this PC
(AMILO LL 3220T) 1 is attached to NVIDIA GeForce 8800 GTS
Wblind.dll 2009/11/16 18:43:20
Wbsrv.dll 2009/11/12 15:19:07
SevenConfig.exe 2009/11/12 17:16:53
Wbload.exe 2009/11/06 18:44:12
Wbhelp.dll 2009/10/07 21:35:07
Tray.dll 2009/10/21 15:13:19
Wbload.dll 2009/09/25 14:41:29
Screen.exe 2009/11/07 18:39:26
Regards,
Rasmus Bertelsen