I've noticed numerous times that when entering a reply to a post, my cursor will jump to the top of the paragraph. This happens mid-sentence. I can't figure out how to prevent this once it happens. It is very annoying. Perhaps I'm hitting a certain key sequence by mistake, but you'd think I could simply place the cursor back to where I want it to be and continue typing, but if I do, it jumps back to the top of the paragraph. I'm using firefox on a windows 7 machine.