Sorry for the trouble this is causing -
this post describes what worked for another customer having this problem.
I don't remember the exact cause of the problem, but my recollection of the general problem is that we're having trouble logging into the sync server. Somehow, we get trapped in a loop where we're trying to log in over and over without success. Once the loop proceeds enough, you get the 'too many open files' message.
I'm not sure if this is a bug on the server end, a bug on our end, or something outside of our control completely. If you
mail the Support Ninjas, they can track down the details for you.