I’m having problems in my 64 bit Windows 7 beta with the built in support for unzipping zip-files containing *lots* of files. It often hangs near the end and I have to reboot to sort things out.

Downloaded 64 bit version of 7-Zip and it work fine – so far. You might want to try that one out if you have the same problems. Eventually it may also hang, but I’ll try it for a while and shout out if I notice any probs.