I use an iPad. Sometimes the screen stays frozen on the top half of the pages with the opening posts. Sometimes refreshing the page seems to do the trick.
Also, if I am replying to a post, sometimes I can't go back to view somebody's comment again, then drop back down to where I was typing. It doesn't recognize that I'm typing anymore. If I refresh at that point, I have to start over with my post.
Is this a personal problem?