Uninstalling various bits and reinstalling them doesn't seem to sort it
out...as it appears that faad2 is built against an older ffmpeg-libs
than's in the current FC6
What repos are you using ?
I saw something just like this with ffmpeg when trying to run with livna
and atrpms at the same time, on my last FC6 box. There are
incompatibilities between these two repos which mean, in practise, its
not a good idea to run with both fully activated.
I currently am using both, but have yum priorities installed and have
given atrpms a lower priority than livna, which means livna is always
preferred over atrpms, even if atrpms has a newer version...
Chris