The latest test realm patch notes can always be found at http://www.worldofwarcraft.com/patchnotes/test-realm-patchnotes.html
o Corrected an issue where players could disconnect upon leveling.
o Fixed an issue in which players could get stuck at the loading screen when utilizing a portal to Dalaran.
o Shoulder armor will now attach correctly to Blood Elf Male characters.
o Fixed an issue in which Spirit of Redemption was being prematurely canceled upon use of other abilities.
* Mac specific
o Corrected disconnection errors upon login for Power PCs and Mac users running 10.4.11 with GeForce 8600s.
* User Interface
o Enabling the command 'fixedfunction 1' will no longer cause graphical issues.