I hadn't noticed but it's true that the images don't load. They show up as little Android symbols with a "Download" button beside them. If you tap on the download button the reply menu (for the post) comes up (reply, quote, Multi, Share, More). There doesn't seem to be any option to actually download. It's maybe the software on the device as opposed to something on the forum. I will report to Tapatalk and see what they say.
Still, even with that problem, it's great mobile software, and makes it much easier to keep up with what's going on when you are on the road.