There's quite a lot of changes for FFmpg 0.9 since the 0.8 series. Among the changes is a native Dirac decoder, MMSH seeking support, support for reading MPO fils, a libass filter, FLB sample-rate change support, many ARM optimizations, libspeex encoding support, hardware accelerated H.264 decoding for Google Android, libswresample support, and much more. There's also many bug-fixes as part of this new release.
The FFmpeg project encourages everyone to upgrade to version 0.9 unless they are followers of Git master.
Fetch the latest FFmpeg release from FFmpeg.org.