If you update your Firefox browser to its latest version 3.0.1 then the roboform will get deactivated. The reason being that there appears to be no compatible version of Roboform for latest Firefox 3.0.1 Though Firefox will search for an updated addon version of Roboform but it'l not locate any. The same thing will happen to your Stumbleupon and del.icio.us toolbars (if installed in the browsers). They all will get deactivated in the new Firefox.
The solution for Roboform: Actually an update do exists which for some unknown reason is not getting identified by new version of Firefox. You need to manually install it.
Download/install this update from Roboform :
Once installed, it will again reactivate the Roboform.
I hope this will help some members here.