Version: 0.73
Seems that after a couple of uploads (some terminated, or failed for whatever reason), the upload count becomes negative (-1, -2, etc). (I'm guessing the code tracking uploads doesn't receive notifications of error conditions)

This is usually followed by gnotella coming down to 2-3 connections (mine's set at 10) and the catcher list empties itself.

Any attempts to add a host cache to the list results in a connection with little or no activity... which eventually comes off the list. After restarting the app everything works again, for a few hours (until uploads start again?)