Theres a bug in 1.3.5 that if you dont have a download limit set, it will not try to download files. I will release a beta soon so get that and it will be fixed.

I've been some having some problems with resuming, anyone else? sometimes the file is corrupted when it really shouldnt be since I was just downloading from that server a second ago.

Stability should be very good in this version, especially for serving files for extended amounts of time, the beta should introduce some better logging of uploads so memory isnt hogged. Limiting upload bandwidth I have to check out because I think it is broken. You can downgrade your version at the gnucleus page on sourceforge but I dont suggest it since 1.3.5 cleans sockets up after itself which is good for other internet programs running on your computer.