Audio problem with some videos

My system is Kdenlive 0.7.7.1. in Ubuntu 9.10.

I make videos with a camera for pictures. In a video player the sound plays without problem, but in Kdenlive there are sound fluctuations before and after rendering.

I have a similar problem with a distribution based on Ubuntu 8.10.

The audio characteristics of the clips are:
- Uncompressed 8-bit PCM audio
- 11024 Hz

Any solution?

Thanks.

Daniel

File a bug along with a sample source file.