Okay, this is difficult to explain, so I took a bunch of screenshots. A picture's worth a thousand words, right?
I'm running Windows Vista Ultimate, SP1. For the majority of the time since Vista came out, I've been using the Aero skin, with really only "glass" color changes to match wallpaper, iconpackager and objectdock changes. I used WindowBlinds off and on, but truly I was pretty happy with Aero running most of the time.
A few months ago, I got the craving to use WindowBlinds again. Specifically, I wanted to use Stardock's fabulous Aero Executive theme for that hardwood look.
But here's the problem:
If I start in Aero and apply the Aero Executive theme in WB6.1, everything works fine. The skin looks and functions as it should.
However, over time (maybe 1 full day to 2 days of use), transparency just suddenly stops. I've never noticed the "transition point" at the moment it happens, but I'd walk back to my computer and see that it had happened.
My first clue is that the taskbar doesn't have the nice rounded edges with transparent background behind the corners. Instead, I see a light gray background. Also, (although it's hard to tell because the background is dark at the
bottom of the screen), the taskbar has lost transparency:

Taking a tour around the desktop, I also notice that the Start Menu has lost transparency:

Title bars have also lost transparency and the wood grain looks a little "coarser":

Strangely, a few title bars start to show up in a Windows Classic appearance, but with colors set to match the Aero Executive theme:

If I go to the WB Config window, "Aero Executive (Vista)" is selected, and it is rendered (in the preview) appropriately, with transparency. However, this is not what is happening on the system.

If I try reloading the theme, transparency is
not restored. If I try loading a different theme, transparency is
not restored. If I turn off transparency ("Never use per-pixel borders on a skin") and then re-enable it and reload the skin, nothing changes.
If I unload WindowBlinds, then Windows reverts to Windows Standard (ugly!):

Notice that Windows Vista Basic is listed in the color scheme options. If I click on that in an attempt to get back to Aero, I get Windows Vista Basic but not Aero:

Nothing I do at this point gets me back to Aero. Re-running WindowBlinds and re-loading a per-pixel skin does
not restore transparency.
The only way to get back to Aero is to unload WindowBlinds and reboot the computer.
Finally, if I run WindowBlinds and load a per-pixel skin (from Aero, again), then everything is fine. But repeatedly, at some point, transparency fails and I'm back to the above sequence of events (unload WB, get Windows Standard, try unsuccessfully to get Aero back, stuck with Windows Vista Basic, and need to reboot, reload WB, reload per-pixel skin, works fine, transparency fails, ...).
Any thoughts?? It's driving me crazy!
~ Alessandro (cavalierex)
Your computer has a Windows Experience Index base score of 3.4
Your Windows Graphics Experience score is 5.9
WindowBlinds version : WindowBlinds 6.1 (build 91 x86 - Vista Edition)
WindowBlinds is installed correctly on this PC
WindowBlinds appears to be activated on this PC
(Generic PnP Monitor) 1 is attached to ATI MOBILITY RADEON 9700 Series
Wblind.dll 2008/03/17 12:45:20
Wbsrv.dll 2008/02/13 17:15:29
Wbconfig.exe 2008/02/20 14:52:33
Wbload.exe 2008/02/14 12:05:14
Wbhelp.dll 2007/08/27 12:54:07
Tray.dll 2007/09/12 17:58:21
Wbload.dll 2007/09/12 17:58:28
Screen.exe 2008/01/14 18:02:18