you can uninstall whatever piece of software started the problems and reinstall the correct, older version easily....
we have two mac's in our house, with the older Firefox 3 was too much trouble so we uninstalled and went back to the older version.....with the newest mac Firefox 3 is great, no problems!
Has anyone downloaded the latest Realplayer for Leopard? We did and it looks cool but aside from new format + picture quality I haven't seen anything that makes it better than the last Realplayer!! Any thoughts?