Problem is they've been "working" on this same problem *forever*. LimeWire has always been infamous as one of the worst peers for resuming files - makes it kind of useless for anything larger than a few meg.

Many other gnutella peers (Gnucleus for one) manage this quite well with the current protocol by just having a re-search option to find more sources.

LW tries half-heartedly, but if it can't resume immediately it either overwrites (should never be allowed to happen) or more likely just gives up enitrely. There's nothing more frustrating than having 90% of a 100+ meg file in your download folder, being able to find more sources in a search, but having absolutely no way to use them to resume.