After running amule for some time, there will be high disk activity and then the system will hang.
This problem occurs on both i686 and amd64 architectures, regardless of what desktop environment you use.
It started happening after I set a download limit, under bandwidth.
If you're experiencing the same problem, set the download limit to 0 and you should be fine.
Running amule with download limit set crashes system
aMule is crashing since last Ubuntu update
aMule crashes in kernels 23 and 24