Sgt_Kickaxe - 6:42 am on Jul 24, 2010 (gmt 0)
Not having any data available for the browser is something major search engines like Google don't want, their harvesters are always hungry.
I just wanted to add that it's not as dangerous to have auto-complete on as it is to enter ANY form box information on a site you don't trust. You have no way of knowing if the password or other information you type in is secure afterwards or if a script is copying it.
NEVER use the same login name and password on more than one site.