I upgraded to v3 a couple of days ago. Seemed OK at first though a bit confusing with all the learning going on. Problem came when I tried to update a website I own. The system would not allow an FTP transfer. I disabled Comodo Firewall and successfully made my changes. However now when I access that site it is incomplete (no jpg files, menus etc). I have accessed using different desktop and diffeent computer - site is fine. Seems COMODO has put a block on my system. I have uninstalled, but to no avail. Any thoughts?
Have your tried restoring the default settings in your browser?
Are you using the Comodo predefined FTP policy? The rule for passive FTP is missing, and that is what most clients use. Add a rule to the Policy to allow TCP out from any to any and see if that helps.