"LaTeX2e now incorporates, by default, changes previously included only by explicitly loading the fixltx2e package, which is now a no-op. A new latexrelease package and other mechanisms allow for controlling what is done. The included LATEX News #22 and “LATEX changes” documents have details. Incidentally, the babel and psnfss packages, while core parts of LATEX, are maintained separately and are not affected by these changes (and should still work). Internally, LaTeX2e now includes Unicode-related engine configuration (what characters are letters, naming of primitives, etc.) which was previously part of TEX Live. This change is intended to be invisible to users; a few low-level internal control sequences have been renamed or removed, but the behavior should be just the same. pdfTEX: Support JPEG Exif as well as JFIF; do not even emit a warning if \pdfinclusionerrorlevel is negative; sync with xpdf 3.04. LuaTEX: New library newtokenlib for scanning tokens; bug fixes in the normal random number generator and other places. XeTEX: Image handling fixes; xdvipdfmx binary looked for first as a sibling to xetex; internal XDV opcodes changed. MetaPost: New numbersystem binary; new Japanese-enabled upmpost and updvitomp programs, analogous to up*tex. MacTEX: Updates to the included Ghostscript package for CJK support. The TEX Distribution Preference Pane now works in Yosemite (Mac OS X 10.10). Resource-fork font suitcases (generally without an extension) are no longer supported by XeTEX; data-fork suitcases (.dfont) remain supported. Infrastructure: The fmtutil script has been reimplemented to read fmtutil.cnf on a per-tree basis, analogous to updmap. Web2C mktex* scripts (including mktexlsr, mktextfm, mktexpk) now prefer programs in their own directory, instead of always using the existing PATH. Platforms: *-kfreebsd removed, since TEX Live is now easily available through the system platform mechanisms. Support for some additional platforms is available as custom binaries (http://tug.org/texlive/custom-bin.html). In addition, some platforms are now omitted from the DVD (simply to save space), but can be installed normally over the net. "
Bumped :) I've also put my notes on the wiki: https://wiki.gentoo.org/wiki/Project:TeX/Tex_Live_Bump_Story please feel free to improve it!
