Hi there..
The same problem occurs to me when I use MacOX (ver 10.1.5) and Limewire, but not with the version running on a MacOS9.5 system.. at the same time on the same subnet).

Surprisnigly, this is relatively new ..
I don-t have any solution, but this observation might be helpful to understand part of the problem, its reproducibility, etc..
I will folow this list, hopingit will progressS!

Regards,

Claude