The AMD Catalyst 12.4 (fglrx 8.96 series) driver can be found at AMD.com.
As usual, AMD still isn't providing a change-log for the monthly Linux Catalyst driver releases. However, here's some details I do know about this month's driver...
There's now openSUSE 12.1 production support, early-look support for Ubuntu 12.04, Linux PowerXpress support for the Intel Ivy Bridge platform, packaging script updates, and various bug-fixes.
Among the bug-fixes for Catalyst 12.4 on Linux is fixing some multi-head issues, a system hang in certain PowerXpress configurations, fixing a system hang when using OpenGL overlays, correcting an OpenGL performance drop, a soft-hang when killing the X Server, and severe corruption for OpenGL games using the AMD "Redwood" graphics processors.