I believe the "post-release" version of fglrx is the package called "fglrx-updates" in Ubuntu 11.10.
In Ubuntu 11.10 presently,
fglrx is version 2:8.881-0ubuntu4
fglrx-updates is version 2:8.881-0ubuntu6
So you're unlikely to see any difference right now. Perhaps later when fglrx-updates gets upgraded to a higher version than fglrx, but it hasn't yet...
I believe the "post-release" version of fglrx is the package called "fglrx-updates" in Ubuntu 11.10.
In Ubuntu 11.10 presently,
fglrx is version 2:8.881-0ubuntu4
fglrx-updates is version 2:8.881-0ubuntu6
So you're unlikely to see any difference right now. Perhaps later when fglrx-updates gets upgraded to a higher version than fglrx, but it hasn't yet...