It sounds like there may be a couple of problems here. Joakim says that LimeWire reports no progress, than instantly jumps to 100%. This indeed sounds like a bug. Does it say "downloading from N hosts" before it completes? What's N?

blondie11979: I can't tell if you're getting the same bug or just bad luck with really slow uploaders. How many hosts is LimeWire downloading from? Are you getting "0.0 KB/s" or just really small values? Can you see progress in the Incomplete directory? (Unfortunately LimeWire if LimeWire is filling in "holes" in the middle of an incomplete file, the reported size on disk won't change.)

-Chris