So far the only skin I've had that happen with was Naked Noir (on Win 7).

So the skin isnt showing the normal shutdown buttons or isnt there a button at all ?
Some skins have replaced the old shutdown buttons against something more unique like a skull picture for shutdown that of course is just an example.
But if you dont have any shutdown buttons showing under the startmenu you could open windowblinds and change the skin back to a familiar skin ( one that worked for you earlier )and then try to reload the other skin.

If you could post a screenshot of the issue it would help.

Also copy and paste you windowblinds info here it should look something like this:

Your computer has a Windows Experience Index base score of 5.7
Your Windows Graphics Experience score is 6.7

WindowBlinds version : WindowBlinds 7.2 (build 303 - Windows 7 Edition) - 64 bit OS

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 HD 5730

Wblind.dll         2011/03/29 11:34:20
Wblind64.dll         2011/03/29 11:34:15
Wbsrv.dll         2010/08/09 14:03:56
SevenConfig.exe         2011/03/29 11:34:52
Wbload.exe         2010/11/29 20:40:35
Wbhelp.dll         2010/11/29 20:40:34
Tray.dll              2010/04/01 23:40:19
Wbload.dll              2010/04/27 11:10:25
Screen.exe         2010/06/07 21:10:43

2of3 is on the right track. Do post your "About Windowblinds" info.

You can see if you have the latest and also see if your version of WB is not corrupted by opening Impulse, choosing WindowBlinds and then doing

"Shift + Right click". In the submenu that opens, choose  "Verify Installation".