Put the Power Control Widget on one of your home screens and make sure that the sync control is on/active. I've read a few post where something unknown turned the sync off.
I remember you were having rebooting problems the other day. Sounds like you have some kind of conflicting app running on that device. The problem with these awesome phones and all the apps we have available is that some may not play well together and everyone has different stuff installed on theirs. While app abc may work fine on one phone, when you combine the calls that it makes to the OS with app def and hij, a problem pops up.
On a side note, Fuente wants too much for those OpusX's! It's a great smoke, but overpriced and hard to find. La Gloria Cubana a nice alternative...great smoke and reasonable price. Ever tried them?