Ok, so I finally figured out the picture thing. Here are a couple of pictures of the in-game crashes. This one is from a few days ago; I had been in the dungeon for a while when it occurred:
This one is from tonight, and it occurred right after opening a dungeon:
This is what happens to the game screen if I scroll down after the crash:
Here is an error I got yesterday while trying to log on:
Hopefully these are helpful! Both of these are from the Southern Swamp area, but it freezes in any dungeon. I can't find a pattern--sometimes it's when I'm attacking, using a glyph, just walking... It makes no sense!
Thanks so much for your attention into this.