Jon,
Personally I have had no luck with my Android phone for managing image posting. There is a thread here in the "computers and TG" forum that suggests success with Iphone. I dunno..
I do know that soon enough, when Rob has finished with his metamorphosis, all of this will be moot. There will be direct posting to the TG server.
As I understand it, the goal is to rely on our own capability to host images...so that there will be no chance of blackmail or chance of lost images to the life's blood of TG hunting threads. Pics are pure gold here.
Rob can most likely answer your question re: Iphone image posting as it relates to the new process...