Hardware restrictions stop you updating to OS 10.3.9? I have an older G4 here (400 Mhz) which was one of the very 1st G4's but it's happily running 10.3.9 So I can only guess you're running a G3 or earlier. If you decide to update to 10.3.9 then I'd suggest you get the standalone Combo installer (ie: install it from your computer, not over the net using soft update!) By updating your OSX you'll also be updating Java to 1.4.2_05
The reason I suggested the standalone installer is b/c there's been issues with using software update re: Java. OS 10.3.9 Combo installer (click on link)

Java 1.5 is only available to 10.4 users.

LW 4.9.24 has been released & can be obtained from here: http://www.limewire.com/english/content/beta.shtml