Same problem here, running RedHat 7.2, slightly modified 2.4.7-10 kernel, ext3 fs, LimeWire 2.1.1.

The behaviour seems erratic here too; I've been trying, unsuccessfully, to find a pattern. The most common scenario is that an attempted resume will ignore the incomplete file and start over, this time storing the new download *nowhere at all*. When the new download is "done", it copies the *old* incomplete file over to the shared directory. So I'm left with an incomplete file even though I waited for the full download to complete the second time around.