don - people (including myself) were starting to have login issues even on the old software that's why I upgraded to the latest stable version. The login issues persisted after the upgrade and across multiple browsers. The only constant is the hosting server.
Next time you, or anybody, has a login problem e-mail admin with the exact time you tried to log in, your IP (if you know it), and any error message. I'll look at the server access log and see if there might be a clue there.