Ok, so this is bugging the crap out of me. It's the smallest thing, but I can't stand it.
When I send an SMS, after I hit send, on my 8330, it went back to my SMS/MMS box (I separate my SMS/MMS and e-mails). Anyway, now on my Tour after I hit send it takes me to my E-mail inbox.
And likewise when I send an e-mail, it takes me to my SMS/MMS inbox. What the heck is going on here!?