I've noticed that Livejournal's update journal page is acting a little strange. It keeps stretching out to uncomfortable proportions. I've heard others complaining about it, but last night was the first I've ever personally seen it. What do you suppose is making it do that?
If you're particularly annoyed by it, and don't want to use a client, try cutting your text, and leaving the page. You can come back to it and paste your text right back, buying yourself a little time before it starts extending again.