After upgrading to 1.8.3 I have the feeling that something is not working exactly as it should: This happened few times actually... the problems with utilizing whole available seem to appear in seeding mode only. The speed settings are pretty much defaults for my upload (2Mbit), except one thing - I'm using unlimited global upload rate (zero) with automatic turned off (just in case: yes, my ISP does the queuing thank you, and yes, I have a good reason to keep my upload unlimited instead restrain it"properly" at ca 180kB/s) Anyway, I didn't have such problems at 1.8.2. Any ideas?