http://www.haskell.org/ghc/dist/6.6.1/ghc-6.6.1-i386-windows-test1.exe

Might be worth trying that to see if there's still a problem.

There is still a problem when I use the version you linked to. At first I was hopeful, because the first time I tried compiling bisect.hs it worked. All subsequent attempts, however, have failed.