Hello,

I also ran into an error with the Windows binary installer. I had a previous
version of mercurial installed (0.9.x) and running the 1.0.1 binary installer
prevented the hg command line program from working. After trying to upgrade,
typing 'hg' at a command prompt gave me a python error. I logged in as an
Administrator on my computer, ran the Uninstall utility, and then re-ran the
1.0.1 binary installer; then mercurial worked just fine.

(Sorry, I forgot to write down what the python error was :( If you want I can
try to reproduce it; let me know)

Perhaps we could just add a note to the binary packages page (
http://mercurial.berkwood.com/ ) saying that old versions of mercurial should be
uninstalled before running the new binary installation? Or is it the intent that
the binary program should also upgrade old versions?