There is now a fix for Veetle on the ATV2 read more here:
download this file from here
avformat-52-arm-osx.zip
copy this file to here on your apple tv 2
/private/var/stash/Applications/XBMC.frappliance/XBMCData/XBMCHome/system/players/dvdplayer
Once this is done your Veetle will be fixed just been watching it for the last hour
enjoy
Banshee