This is ridiculous. Apparently, part of Adobe's Creative Suite 3 (the Adobe Version Cue CS3 Server) requires the Mac firewall to be shut down in order to install correctly. The Adobe installer obligingly shuts your firewall off, but then neglects to restart it afterwards. Adobe has 'fessed up to the problem (as a "critical issue") and suggests manually starting your firewall. So the long and the short of it is this: if you've installed CS3 you need to check to make sure that your firewall is still running. Go the Firewall tab of the Sharing Preference Pane, and if it's not running, click "Start." Adobe is already on thin ice as far as I concerned with their insanely annoying installers, and now this firewall problem is just plain bad.
[via Daring Fireball]