This call for graphics testing help isn't limited to Fedora users since there is easy-to-use LiveCDs to try out testing the open-source Linux graphics drivers. The fixes and changes that come about by Fedora developers as a result of this test information is also submitted back upstream so it benefits other Linux distributions too... The Fedora test days tend to be very worthwhile each release cycle for improving the quality of Linux as a whole. Any bugs that come up this week will also hopefully be resolved for Fedora 19.
For those interested in participating in the Fedora 19 Graphics Test Week, read this blog post by Red Hat's Adam Williamson. The key information is on the Fedora Wiki for Intel, Nouveau, and Radeon.