I read a few posts on the forum that clearly state Vista is not yet supported.
Since a few days or so the MinGW team released an official Vista compatible compiler suite. I'd say C::b is finally Vista compatible. (...)
I just checked the Sourceforge site for the MinGW releases, the newest compiler-relevant release was GNU Binutils Technology Preview: binutils-2.18.50-20080109, do you mean that one? Or can you specify more what release you mean? I can't find any other recent releases on the website.
I have also used Codeblocks with older versions of MinGW in Vista, but I had to tweak a few things first and my projects have to be on the same partition as the MinGW suite, which kinda sucks. :/