gem freezes

Might be more of a general Ruby question I suppose, but you guys will
know anyhow ...

After an upgrade to Leopard (a clean install, not a literal upgrade)
I've copied my projects back onto my Mac, but I get an error when
trying to start Mongrel that according to sources on the internet
indicate that I'm missing some gems.

When I try and install them however, the gem command just seems to
hang and I have to kill it.

Any ideas?

You may have better results posting this to the ruby-talk mailing list.

Michael Guterl