I think I have found a solution to this. On my Sony Vaio VPCF11S1E
running an nVidia 330M, I did this:

1. Start CompizConfig Settings Manager.
2. Type in "workaround" in the filter text box.
3. Tick "Fix screen updates in XGL with fglrx".
4. Tick "Force synchronization between X and GLX".

I have no idea what these do, but it seems to have solved "jerky/laggy
window movement" issue for me in 11.10.

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https://bugs.launchpad.net/bugs/861061

Title:
  compiz 3d performance regression

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