ngrep not showing packets

[dninja at gmail.com (Robin Wood)]

Hi
I'm playing with ngrep and if I run it without a filter it shows the
packets but as soon as I add a filter all I get out is #'s. The number
of #s matches the number of packets so the filter is working but it
just doesn't show the data.

I'm running this on a pcap and have tried running it as root just in
case there were privilege problems but that didn't help. tcpdump shows
the data correctly.

A friend says he has seen this before but can't remember what caused it.

Can anyone help?

Robin