It craps out at various points, but here's a typical error message:
Group 2 of 8 Processing alt.binaries.abc Group alt.binaries.abc has 4,102,880 new parts. First: 104642385 Last: 2278275563 Local last: 2274172683 Getting 4,102,880 parts (2274172684 to 2278275563) - 0 in queue Killed