Neil..
As you may know the entire planet has been forced into using the latest version of Windows Live Messenger (MSN)

Prior to this release on WLM 8.5, Messenger was using WB frames, always has, but now... on XP it is using the lame Microsoft bitmapped, opaque, non dropshadowed frames, which honestly are quite horrible...Shown above.
Now... on Vista and 7, MSN is using Aero or WB frames correctly, it looks normal like it used to on XP... but after installing the latest Live messenger on XP they look like the image above.
Link to latest MSN http://download.live.com/?sku=messenger
Please PLEASE tell me you can get this remedied back to using WB frames in XP again. Lots of people still use XP.
Thanks man.