When attempting to take a picture the snapshot button seems to be stuck and will not release into its normal position.

If you notice that your picture quality is not up to your expectations or that you can not get your camera to focus no matter what you do, it is possible that the reflex mirror located behind the lens is simply dirty. If that is the case, it is very simple to reach this mirror and clean it with the appropriate solution. However, in some cases it is possible that this reflex mirror is cracked due to impact or accidental dropping of the device. If this is the case, then there are steps that can help you replace this mirror and restore your picture quality. for more information visit the troubleshooting page created for this device. Canon EOS Digital Rebel XTi Troubleshooting

If you are having to manually open the flash on your camera it is possible that the flash latch is bent or cracked, or the spring that releases the latch is simply worn due to long term use, To identify the problem you should inspect the flash module area for any obvious damages, If no damages are visible, the solution to this problem could most likely be reached by replacing the spring found within the camera. For more information on this issue visit the troubleshooting page created for this device. Canon EOS Digital Rebel XTi Troubleshooting