Had a problem with my uncapped account, went dead yesterday for no reason. My capped one still works fine (suing now), the uncapped one returns an error about PAP when the router tried to connect. Not best pleased seeing as I still had over a gig left on the uncapped account and now can't use it.
No connection issues as such though, if anything my lines been more stable these past few days (and today) than it ever has been.