#13 Jamloader (Linux) fails to upload

System: Ubuntu 6.06LTS ix86
Network: static IP4 behind NAT/DSL (Debian Sarge, x86),
IP6 is firewalled but not translated. (should not be
significant here)
Problem: FLAC files are made/copied, but upload fails.
Network speed is displayed correctly, but no progress
appears.
Iptraf shows SYN/SYN-ACK with 158.64.60.199 on several
ports like 22, 21, 80 and 8090 but no sufficient data
transfer. No more than some kBites are sent on any
connection.
This appears with Jamloader 1.9.9 and rc2
Our company NAT is definitely set up correctly, it has
been in productive use for years.

[Anonymous]

debug.log