Well, I have the most recent version of java (1.5.0_06), and I now have LW 4.12.6, and it's still slow (3-7KB/s). By a different connection, I mean that my roomate is connected through his wireless router, which is connected to a different jack than mine is. Even when I use that wireless on my computer, it still downloads slow. I have McAffe Personal firewall plus, but LW is allowed full access. When I downloaded LW today, it went at speeds of up to 125KB/s on Internet Explorer.

The most recent Java version is 1.5.0_08. If youn want to install it than make sure you've uninstalled all previous versions and rebooted. Then use the JRE offline installer to install the new one. You can get it here:
http://java.sun.com/j2se/1.5.0/download.jsp

The preference folder of the 4.12.6 LW version is called " LimeWire" and is located in the hidden Application Data Folder (explanations about it in the link I gave you above).

It is also possible that the McAfee is properly configurated. You should add the listening port of LW to the list of exceptions.
LW>Tools>Options>Advanced>Firewall.....there you'll find the listening port.

__________________

"Never Argue With An Idiot. They Will Drag You Down To Their Level, Then Beat You With Experience"

Ok, I downloaded the newest version of Java from that link. Set the ports to what LW says in McAfee. Deleted the hidden preferences folder, restarted my computer a couple of times, and still, it tops out at 8KB/s. I'd turn McAfee off, but I have no idea if that's the problem, or what that would do to my system. I'd buy LW Pro, but I don't want to do that until I make sure it's going to work the way it should.

Well, he just downloaded 2 songs at abotu 45KB/s, and when I try to download that song, I get it from 7 hosts (there's over 60 for the song, at T3 or highger speed), and it downloads at a max of 8KB/s. And no, I do not have Windows firewall running at the same time as McAfee. And yes, I do have UPnP enabled in LW. His LW currently says he is behind a firewall, but yet he downloads files far faster and from less hosts.