usernames/passwords

[gnome]

Does vbulletin do something that prevents internet explorer's "autocomplete" feature and mozilla's 'password manager" from saving usernames and passwords for this site?

[Chen]

Yes. Before the form is submitted the password is hashed and sent to the server in MD5 format, while the original form field is cleared. So while your real password is not transmitted over the network in plain-text, it does prevent any browser from caching it.