You can see here a screenshot of a normal eDonkey DL/UP process.
The green bars indicate the download's highest point (80kb/s), and the yellow' s one indicate the upload highest point (18).
Seems that everything is allright. I can even surf the web and chat with my other computer.

In this picture I ran the eMule 0.20b with the same files I was downloading with eDonkey (picture above).
I let it run 2 hours to give it a chance to stabilize but it didn' t. In facts I realize that when the eMule was
uploading, the upload transfer rate was not constant it bounce from 3kb/s to 30.5kb/s ! killing the download speed.

I tried to reduce the upload limit progressively to 3kb/s to see if bounces stops, but with no success.
Is this a bug? or I have the wrong setting ?

Please download DU Meter and try it, it' s free for 30 days and let me know if it' s happening to you too.

Thanx !