Using 2.0.10b on Windows XP SP1.
If you use the divider piece between the user listbox
and the channel text area to widen or narrow it, the
icons indicating status (ops, voice, etc) do not
refresh themselves properly. Moving the cursor over
the icons repaints them. This only occurs if you drag
the width bar to the right-- not the left. This is due
to the bar graphics overlapping the icon graphics. This
bug has also been in other versions, so it may be a
regression (not sure if it was previously fixed).
Screenshot (blurred out names for privacy):