Sound problem with quicktime movies from kodak easyshare Z612 camera

When I play movies from my digital camera the sounds oscilates. When it is on you can here what is being said but it is very annoying. The files are fine if I play them elsewhere and its doesn't matter which prgram I use in Kubuntu - kaffeine or mplayer.  The camera is a Kodak easyshare Z612 and the encoding of the files is -Mime:video/quicktimeAudio:mu-law logarithmic PCM (ffmpeg) 128kb/sVideo:ISO MPEG-4 (ffmpeg) 640x486(640x480)My computer is a dell dimension E521  AMD 64, 1GB RAM, Kubuntu 7.04Anybody have any ideas or solutions?  Thanks.