Most of TeX Live is a redistribution of packages and programs from elsewhere, primarily CTAN. So, the target for bug reports varies according to the nature of the problem.
Highlights of changes in this release. If you need to use alternate binaries, the custom binary support in the TL installer may prove useful.
Known issues in TeX Live 2012:
# cd /usr/ports/x11-toolkits/p5-Tk # make -DWITH_XFT install clean
Bug archives for the previous release and earlier years are still online.