I haven't had any of the issues you're having. I did find an update to 7.0.0.576 waiting on DM. Have been running the updated OS for a day and all has been working flawlessly. Maybe the update will clear-out the gremlins.
No issues. Once I downloaded the update, I used DM to install it. I thought that I was going to use the apploader method which I have not done in a couple of years. I am on BES as this is my work 9900. Could it be a service book issue? Did you try removing account and re-adding it?