The quoted text (and post body sometimes) can become way too narrow. This occurs on Firefox and IE and I believe it just started happening with my recent install of 4.0.1. Occurs with all plugins disabled as well.
How to reproduce.
In a thread, click 'Reply With Quote', and add some body text.
Click Post Quick Reply.
The post, including the quote box, will look normal.
Reduce the browser width and the quote box becomes extremely narrow, displaying one character per line.
Increase the browser width and the quote will return to normal.
It seems a refresh will fix the next to the last post but not the last post. Also, the first post has become too narrow and it doesn't have any quoted text.
Are others seeing this?
Oh, I just looked at this thread and noticed the first post is too narrow and the last post of page 1 (out of 8) has a quote that is too narrow; just like mine!