Group Edit link hangs - and takes sooo long

In the administrator the Groups names display fine, but the link to edit the details for a particular group seems to just hang forever.

We are getting usernames and groups from Active Directory. We have many groups (but limit results to 1000).

The list displays fine. Its the actual edit link that doesnt work.

Any ideas?

Followup: It FINALLY loaded the page after 20 or so minutes. Any idea why this takes soooooo long?

anyone else experiencing this? this is still a problem for us.