Allrighty guys heres the situation..
I just bought a t1i and the camera is having an issue.. Im wondering is it just mine or anyone else have this issue. I am wondering what are my options, and i'm looking for advice. 
When i shoot in manual, i can change the shutter speed with just the dial. And then to change the aperture setting I need to hold the AV/+/- button like many of you guys know and then move the dial.. And that is the problem.. there are times where it doesn't let me change the aperture setting.. Mine is probably a 30% time i cannot change it.. I usually can but sometimes it doesn't let me.. I just got the camera 3 days ago... So is anyone else having this problem or is it just mine... Things i have done is just shoot in another mode, preferably AV and then a couple mins later I change it back to manual and it works fine.. Most recent, I just turned off the camera, took out the battery and that was also a solution...
Correct me if im wrong but canon has not released a firmware for this camera... correct? Can anyone give me my options on what i can do? If anyone is wondering if this is really an issue for me? I would have to say yes and no.. I usually shoot in AV mode.. but sometimes manual comes in handy.. I also will be shooting a wedding in august 1st and this is one of the bodies i will be using.. So i dont really want to turn it in to canon and see if they can fix.. I would just like to practice as much as possible for right now and get used to this camera. One thing i am afraid of is i wont be able to even change the aperture setting at all...
Should i contact Canon?
And very quick, i got the camera from ebay new... Should i return the camera? Or is it something a firmware can fix? Plz let me no if u need more info... Help is very appreciated 



