With Photoshop CS5 (I think that's what you said) you no longer have access to the latest updates for Camera Raw.
Photoshop CS5 can only take up to Camera Raw 6.7 (latest version is 7.1, which goes with Photoshop CS6 only).
You'll either need to upgrade to Photoshop CS6 or download the free DNG converter and go through the extra step of converting your T4i images to DNG before opening them in Camera Raw 6.7.
You can see what versions of Camera Raw support what cameras here:
And you can see what versions of Camera Raw go with what versions of Photoshop here:
Just to add to Noel's thorough response, I'll let you know that there is a dedicated Adobe Camera Raw forum at:
Please post there if you have further questions or comments.
The problem is that the 6.7 update clearly states that it will do the T4i files. It in the list of supported cameras. I don't mind doing the extra step until I am ready to move to CS6.
Is Adobe not going to fully support new cameras for versions other than CS6?
Adobe does not, as a policy, add new camera support to Photoshop versions other than the current version.
Where do you see documentation that says the T4i is supported in 6.7? I can't find any, either at the link I provided above or in the Camera_Raw_6.7_ReadMe.pdf file.
The problem is that the 6.7 update clearly states that it will do the T4i files...
Where do you think it states that? I find no such "statement".
I retraced my steps. When I was on the 6.7 download page and clicked on the link for a total list of cameras covered, it took me to a CS6 page...that isn't logical, but that is what happened. Go read what I put in the Camera RAW forum please.
I have a canon t3 and I have the same issue. I do not shoot in jpeg and use raw but only LR will oen my raw files. Unfortunately I have to use photoshop for school and I can not. I can not upgrade at this time but it seems as though we pay a lot of money for a product that changes like the wind. Does anybody have a solution?
Honestly, Chocolatelamb, it is very easy to download the standalone converter from Adobe and one simple step will convert all of your Canon T3 images to DNG, which is lossless. I put the standalone on another computer to test (because I had the CS6 EXT on this machine by that time) the CS5 with the Canon files and the standalone converter and it works fabulously, and is free. If you have either flash drives or any other external storage, it will help you for school...and not eat up a lot of hard drive space. Download the converter, convert your images to DNG (takes seconds) and you will be good to go. It is only a minor inconvenience and will save your having to upgrade at this time. Student time is expensive time, so this is your best answer.