Using Release 8.02 (2008-02-27 19:55:16) gcc 4.2.1 Windows/unicode.
Build appears to save the .cpp etc but does not save the .wxs file.
Well... sory, but I can't reproduce on my Vista machine. wxSmith and C::B is just working properly. But I am using the bundled MinGW 3.4.5 - Vista compiler of C::B 08.02. Mind trying this one? That we we can assure that it's not a compiler problem (yes, I have seen horses flying...). Next thing to try is an updated version of C::B a.k.a "nightly". IIRC there were quite some bug fixes after 08.02.
If both is is not working, too -> mind explaining a little more - e.g. step-by-step instructions what
exactly you do to "achieve" the error?!