Moving skinned joints or fixing their orientation is a pain in the ass. But it doesn't have to be. Here's 2 and 1/2 minutes that'll save you from saving your skin weights out, unbinding, moving your joints and then re-binding and loading your weights back in.
Tutorial Series on Python's PyQt4 module and it's use in the Model View Controller Methodology. Written by: Yasin Uludag (Endureil) of FutureGames. Original Thread it started on can be found here: http://tech-artists.org/forum/showthread.php?t=1440