Wedge

here if you have a code block in your PM that is wider then your screen the whole message becomes that wide and adds a scrollbar for the whole message. in smf the code block gains its own scrollbar so the message stays the same width as all the others. it is much easier to read a message that is narrow and scroll the code block. of course opera browser

also minor issue, if you are looking at the sent messages, if the text of the message is short the width of the message is going to be shorter then other messages so the delete button does not line up between different messages