In any case, if you're having trouble connecting to any FTP, you might go to the Network Pane of System Preferences, switch to the Proxies tab and make sure that "Use Passive FTP Mode" is checked. This did the trick for me. YMMV, naturally.
[robg adds: Safari seems to work fine for me with Passive mode disabled or enabled, but perhaps this will help someone who's having an issue with Safari FTP...]

