Changes so far to OpenSSL 1.0.1g since the 11th include:
* Splitting up libcrypto and libssl build directories
* Fixing a use-after-free bug
* Removal of ancient MacOS, Netware, OS/2, VMS and Windows build junk
* Removal of “bugs” directory, benchmarks, INSTALL files, and shared library goo for lame platforms
* Removal of most (all?) backend engines, some of which didn’t even have appropriate licensing
* Ripping out some windows-specific cruft
* Removal of various wrappers for things like sockets, snprintf, opendir, etc. to actually expose real return values
* KNF of most C files
* Removal of weak entropy additions
* Removal of all heartbeat functionality which resulted in Heartbleed