[mrglsmrc]

i use url-manager pro by alco blom. there are problems synching with firefox here too. but i have a history file in the url manager that can open into ff3 so transitioning into ff3 is easy.
the other way around works in url manger pro beta11 which i use, but not in the standard release.
however it is trialware, so you can test it on your rig.
most of firefoxes problems have been caused by firefox and other outside developers can't fix them.
i apologize for answering an off-topic question here.