I have had to reboot my 7130e twice this week because i stop reciving email from the BES and it tells me that it has not talked to my bb for 12+ hours. Once i reboot all my pending emails makes its way to my bb.
7130e v4.1.0.318

edit --
make it three reboots in a week...

Unless other users on the BES are having the same issue it could be a problem with your handset or account.

not sure about other users, need to ask around.
I will try to talk to our BES admin, and see what up...
Not having probelm with anything else....