Ok, now that I've tested with both clients using the svn version of phex from today, this problem is gone. Uploading is much more reliable, all parts complete, all on one line.

In other news... these two clients are on a local network, and both know that they are connected at 100Mbps, but the transfer is only going at 60KB/s... which is like 10,000KB/s slower than it probably should.

So, with svn version on all ends, completely functional, but strangely slow.