I also have fossil server and fossil ui both working perfectly on two different windows 7 machines. One is running windows 7 32 bit, the other windows 7 64 bit.

In both cases I too have been lazy and just copied fossil.exe to

fossil help ver doesn't show the full path either, only "fossil".

The version I use is 7954ccba68 that I built myself with mingw.

I think the MSDN link a couple comment above is interesting. I built fossil directly on each machine I use it on, so the one I run at home on my 64 bits windows 7 is a 64 bit binary and on my work machine it is a 32 bit binary, so maybe the problem happens only when running a 32 bits binary on a 64 bit windows.

I'm going to try the 32 bit binary I use here at work on my 64 bit windows 7 when I'm home in a few hours and see what happens.