I have been told by GM's not to open tickets for technical problems and to just go to the forums. So, Himmathand, that kinda makes me giggle a bit.
But, guys, simply going to the forms and making several different threads about the same issue isn't going to help much. We need to tell them what's happening and what we've done/tried to do to fix it and what we have found.
I've found that simply not playing my level 25 Barb and playing a new character (a level 5 or so Demon Hunter) allowed me to not d/c every 5 mins.
That and I'd rather people been working on the problem that sitting there staring at the forums saying "ok we're working on it. ok we're working on it. ok we're working on it." after every post. xD
edit : considering it is happening to classes OTHER than the Barbarian it is not a "Whirlwind" problem. Moving along.
well I ONLY have the problem while I used WhirlWind on my barbarian, so there is a link there trust me, many other people have the same WhirlWind issue,
so we know that WW has some sort of bug with it,
Which classes are also having similar issues? try and experiment with spells it could be a bug such as in the Barbarian case.