there is a limit of photo sizes, but it is set in pixels and that doesn't mean anything to me. But from my experience I'd say limit is about 250 Kb- and they appear in some 10-15 minutes. Experimenting with photos over 300 Kb it took them few hours to appear, while these over 400 Kb never appeared.
I uploaded my photo 2 days ago, but it hasn't appeared yet...
I know other people had this problem before, and the photo eventually appeared, but I don't know if that's a normal delay, or a temporary bug, and if so, if I need to submit a support ticket?
[Edited at 2007-01-10 18:15]