I see you have already been in! There are no problems with the iPhone/ITouch users. The issue is with Android, which the bulk of my users have. The 1.x folks can't find Tapatalk in the Market and the 2.1 folks can't upload pictures. Of course, the iPhone guys find this all highly amusing.
This has been fixed, so this thread can be closed. It will be included in the next release. Thanks, guys!