Another problem to add to the automatic editbox size. If you had typed a line in a channel that was long enough to trigger the editbox jumping to 2 lines, if you try to use the up-arrow to scroll thru your history, you get stuck at that point, and can't scroll to an earlier/later history line without highlighting enough of the line to bring it back to a single line, and then hitting DELETE to get rid of it.
The brand new install of mirc 6.33 defaults to automatic editboxes, so this will throw some folks for a loop. Is there a keystroke that's supposed to let you scroll past a line that's been automatically expanded to 2 lines without altering it?