Actually, I too have the same exact problem.

I used to have version 4.7 (? I think that's what it was) and it was the Pro version. I used to fly with 60/70kb, now that I upgraded to 4.10, I don't even get half of that speed. I tried downloading several files (large ones too, over 100 Megs) for testing and even from 9-10 hosts all I get is 20-30 Kb, maybe tops at 40-45 Kb. I also tried that MP3 site, I got 10-15 Kb download speed, before I was at 30-40 Kbs with MP3 files. Even right this moment I got 6 hosts for one file and it's coming down at 5-6 KB. Terrible!

My system: G4, 1 Gig RAM, OS 10.2.8, DSL 1.2 Mbps connection, LimeWire 4.10. I do use a hard and soft firewall (Linksys and Norton, respectively) but I had these before too, didn't make any changes there.

Something is not right here. Too bad I trashed my old version, this new one is no match for the old one.