I had previously had a problem with the System Button not painting with proper trans on a transparent ShutDown/Logoff background on a couple of skins I was developing in WB5. I figured out how to put a little opaque background in the area behind the System Button which worked fine with the System Button painting normally & as I wanted.
The rig I usually develop on has a domain logon so I don't see the ShutDown/Logoff dialogs unless I go to another of my workgroup rigs & load the skin to specifically look. I just noticed that the System Button is no longer painting correctly in those dialogs since the update to WB6 (currently 6.00[b].099 - first version of WB6 that I've taken a look at those dialogs). I just last week updated the last of my rigs from 5.5 to 6 so I can't load the skin on a WB5 rig to be absolutely sure, but I went to a lot of trouble to get the button looking right in those dialogs when I developed them, so I'm pretty certain this represents a change. Curiously, the button paints slightly differently in the ShutDown dialog than it does in the Logoff dialog, even though both use the same background image.
ShutDown dialog button:

Logoff dialog button:

The System Button uses Magic Pink for the corner pixel trans. I had tried using a .tga for the system button back with WB5 & .tga button on .tga background wouldn't work, either.
Anyone else notice a change in the painting of the System Button in these dialogs?
Here's my SysInfo (on XPP):
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.
(Plug and Play Monitor) 1 is attached to 256MB ATI Radeon X1300PRO
Wblind.dll 2007/10/08 13:04:20
Wbsrv.dll 2007/10/04 17:58:43
Wbconfig.exe 2007/10/01 17:35:33
Wbload.exe 2007/09/27 17:47:44
Wbhelp.dll 2007/07/24 10:21:07
Wbui.dll 2007/09/24 19:08:06
Tray.dll 2007/09/12 17:58:21
Screen.exe 2007/10/01 11:23:24
Thanks.