happens to me, too. it is annoying. and dock items jumping around randomly every now and then. (even if the program isn't running.)
Plank 0.2.0~bzr397-0ubuntu1~11.04~ricotz1 Ubuntu 11.04 ATI Radeon HD 3400 fglrx 2:8.850-0ubuntu1-xup2~natty
happens to me, too. it is annoying.
and dock items jumping around randomly every now and then. (even if the program isn't running.)
Plank 0.2.0~bzr397- 0ubuntu1~ 11.04~ricotz1 0ubuntu1- xup2~natty
Ubuntu 11.04
ATI Radeon HD 3400
fglrx 2:8.850-