I've posted results from running the entire conformance test suit under Valgrind at http://kegel.com/wine/valgrind/20071001/ There are 100 files there; one for each test that had warnings. (And one more file with everything concatenated together, http://kegel.com/wine/valgrind/20071001/vg-all.txt)
A lot of the warnings are probably just problems in our conformance tests, not in Wine, and several of the warnings might be problems in Valgrind. But I wouldn't be surprised if there were several dozen real problems in Wine, so please take a look. (Juan has already submitted a bunch of cleanups for crypt32. I'll probably run these tests daily for a while and upload the results to a new directory for each day.)
I've also updated the instructions on how to run tests under Valgrind, http://wiki.winehq.org/Wine_and_Valgrind and updated the Wine patch there to include a bunch more suppressions. - Dan