help debugging

I'm trying to use afterglow 1.5 on a gentoo system and running into an issue that I hope you can help me figure out.
When I read a dump file into, using the switches documented, I get absolutely no output. If I turn on debug, I get my tcpdump lines, preceded by "ERROR:" as below:
ERROR: 2009-05-04 18:37:28.332949 In ethertype IPv4 (0x0800), length 93: (tos 0x0, ttl 61, id 0, offset 0, flags [DF], proto UDP (17), length 77)
ERROR: > 14710 1/0/0 A (49)
If I run with tcpdump -ttnnlr, I get a little closer to the lines in your documentation, in that the timestamp is on the same line as the capture info:
ERROR: 1241462458.413252 In ethertype IPv4 (0x0800), length 93: > 7712 1/0/0 A (49)

There is no description of what the error is, and still no CSV output is appearing.
If it makes a difference, I am running with tcpdump 4.0. If I can add an ebuild for afterglow 2.0 for the gentoo world, I will give that a try and see if I get a little further.