So this killed my phone during inaugural weekend. I guess it was just bad timing. I want to make sure I post about it so that other folks can find the solution as well.

 

Basically, you get to a point where you can't send any text messages, because the tmail.exe process is chewing up all your CPU cycles. This can happen to other apps as well. For example, Google Maps has a search feature that also triggered this issue.

 

The problem appears to be the word suggestion engine. I guess the database of suggested words gets too big or too fragmented at some point.

 

To resolve the problem, go to Start > Settings > Personal > Input. Tap the Word Completion tab, then uncheck the box for "Suggest words when entering text". Optionally, you may want to try simply clicking the Clear Stored Entries button to see if that resolves the issue by itself.

 

Personally, I did not get much use from Word Completion - and even found it annoying sometimes - since I have a full qwerty keyboard on my HTC/T-Mo Wing. As a result, I did not mind losing this feature. Your mileage may vary.

 

Now that I have my phone messaging back, perhaps I should blog my experiences from the Inauguration earlier this week?