I am using TW4 on Vista and am having no problems what so ever. I am enjoying the new version.
------------- Lee Scott - Nikon D3/D300/D5000 - |shaved Nikkor 10.5 mm| Manfrotto 055XPROB tripod /322RC2 Grip - Mrotator TCS |CS5 | PW7 & TW6.5 Pro
----
To err is human ... to not try is just plain lazy