After looking into it a little more, I don't see that option in the messaging app. However, from your homescreen, hit menu> settings> language & keyboard, select your keyboard, and choose auto-cap there. If that doesn't work, I don't know what will.
I believe mine begins the sentence with caps. Are you saying "period" at the end of the prior sentence so it knows to place the period and begin a new sentence? For example: I am on my way home period I will be there in ten minutes period
Yep. I,be tried every tac, even going as far as saying "Function Caps on". Nothing seems to work. Here's what I get using v2t. this is a test. the only word it seems to want to capitalize is the word I. here's an example of having the caps lock button pushed.