Just upgraded to 12.04 and noticed an extremely annoying issue.
While using twinview, there now appears to be a launcher on each screen. Moving the mouse between monitors and over the launcher "captures" the mouse for half a second or so, creating the perception of lag.
According to some bug reports I've read it appears that a launcher on every screen is a new "feature".
Is there any way I can get rid of the 2nd launcher? It's driving my crazy.