For the past two months, the AMD release train has been running full speed ahead as they introduced their new driver code-base and last month had dropped in the AIGLX support. However, this month the AMD train has taken an intermediate stop as this closed-source driver embarks on its next journey. As always, we have all of the details for you on this month's ATI Catalyst 7.11 Linux display driver release.
The first thing you are probably wondering is the version change... AMD has moved their version numbering convention from 8.xx.xx to one similar to their Windows Catalyst driver. Rather than going with 8.43.x, this month's driver is known as Catalyst 7.11 (the 7 signifies the year and 11 for the month). There is also a new numbering system internally, but now is finally starting to change for the public releases. The X.Org logs and other locations will still utilize the previous numbering system, but eventually they will all be following a Catalyst x.xx or x.xxx scheme.
The most noteworthy change in the Catalyst 7.11 driver release is the Linux 2.6.23 kernel support. The Linux 2.6.23 kernel was released last month but it didn't make it into last month's development schedule. However, the Catalyst 7.11 release should now work on any 2.6.23.x kernel, while there will need to be another update for the Linux 2.6.24 kernel.
More here 
Also: RadeonHD v0.0.3 Driver Released