- the top edge of the window drop shadow is sharp and slightly offset.
  presumably this is to keep from drawing over the menu bar at the top.  which
  means either they don't have a good window hint for this or it's just too
  hard to check...

- the dock has a seam between the app bar and the minimized windows bar.  the
  seam jitters a bit when doing the zoom animation, as though the two quads
  are being drawn separately.

- expose' is not vsynced.  you can see tears while the windows resize.  window
  movement and normal window resize appears to be vsynced though.

- the window highlight drawn by expose' when targetting a window has sharp
  corners even though the windows themselves usually don't.

- slow expose' (hold shift) has some visual jitter at the end of the animation
  as the windows settle into their final location.

- window drag may not be double buffered.  Terminal.app flickers pretty bad
  when doing very small moves.

- transparent terminals have ghost text.

- window resize is laggy.  yes, really.  particularly bad on brushed-metal
  windows.  not quite as bad as X + xcompmgr but still nasty.

- clicking on the chiclet button in the top right of Finder windows switches
  between NeXT-style and brushed-metal to OS9 style and plain.  the window
  gravity used for this is totally messed up, apparently it's north gravity
  relative to the navigation pane (as opposed to the toolbar pane on the 
  left in the NeXT style).  since brushed metal has borders this moves the
  chiclet, so, if you click the rightmost edge of the chiclet to switch to
  OS9 style the chiclet moves out from under the cursor.  northeast gravity
  on the reparent would fix this since the chiclet's offset from the top
  and right edges is constant in both window styles.

- related, the chiclet's usage in Finder is inconsistent with the rest of
  the system.  most apps use it to expose or hide a toolbar at the top of
  the window.  Finder has this functionality, but you have to command-click
  on the chiclet to get it, which _rotates_ among six separate toolbar
  styles (widgets and text, widgets only, text only, with two different
  font sizes for each choice - yes, including widgets only, which yes does
  visibly change!).