xz 5.0.2 has been released - http://tukaani.org/xz/xz-5.0.2.tar.xz or Build/source/extra/xz in TL. Build info for TL unchanged, at http://tug.org/texlive/build.html#xz. It would be good to give it a try and send me/commit the new binaries. If there are any problems, we'll have some time to work with Lasse before TL'11 gets too close. Thanks, Karl