| | Update to IM "Connection Error"
After much guesswork, I solved the problem in the following way:
1. Enter Settings -> Options -> Browser Push
2. Change all the "Auto" settings to "Prompt" (this was for every option that starts with the word "Process")
3. Remove and replace the battery for hard restart
4. Start IM application and manually allow connections as they are requested, including IM receive, IM send, and http access.
There are a number of resources out there that describe in detail how the IM application interfaces with SMS to achieve its function. Basically what happened is that I had IM autostart turned off. Because of network issues, a bunch of queued IM-related SMS messages arrived at my device when I turned it back on the next day, and because the IM application was not running and there to receive them, they just piled up in my message box.
Let me know if this solves the problem...