I had a devil of a time with audio syncing. I have two machines running Kdenlive. An Ubuntu 9.04 32 bit box and an Ubuntu 9.10 64 bit system. I'm running the latest 7.6 release. Both machines haad the same problem.
I read the instructions about removing Pulse audio, but it did not help.
After some investigation, it appeared that the audio sync problems only occurred when I edited the clips in Kdenlive. I also read somewhere that there is a problem with audio sync with DV format video. The video was shot with a Canon SD750 which produced AVI files.
My solution was to convert the raw footage to another format. I choose MPG. Interestingly enough, I used Kdenlive to do the conversion. As long as the raw footage was not altered, it converted with no sync issues. Once the clips were converted, I was able to cut and edit them in Kdenlive with no problems to produce my final work.
This looks like a bug.
I'm off to non-video projects, and probably won't be checking this forum. If you need more info, contact me at: kden *dot* zenguy *at* spamgourmet *dot* com.