Auth Advanced Security Features

Hi, Has anyone successful deployed Auth with the advanced security features enabled? If yes, did you have any false positives? I have recently deployed a web application that uses Auth as the authenication system. On initial deployment I turned on all of the advanced security features, however I am now getting about 2% of my users being logged out because the advanced security features detected a security breach. I just spoke to one user whos ISP is ATT-Yahoo who was constantly being logged out because her browser version appears to be changing. I am aware I can turn off specific advanced security features like this: $a = new AuthExtended("DB", $options, "loginFunction"); $a->setAdvancedSecurity(array( AUTH_ADV_IPCHECK => true, AUTH_ADV_USERAGENT => false, AUTH_ADV_CHALLENGE => true )); Thanks, Dan Dan