There are a number of packages since the X.Org 7.4 release last year that have since been abandoned and/or are no longer maintained and then there are some other packages that haven't had new releases, which is needed for X Server 1.7 compatibility. There's also a nice chart comparing the package versions between X.Org 7.4 and 7.5. For those interested, check out his mailing list message for all of the details. Expect X.Org 7.5 to make it out the door in the coming days.
Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.