tshark hex dump

Using tshark 1.2.11 to get a hex dump of packet data gives an error:

/opt/exp/sbin/tshark -r binary_gold -x > text_gold_new ** ERROR:print.c:794:print_hex_data: assertion failed: (edt->pi.data_src) /opt/exp/sbin/tshark[5]: 2259 Abort(coredump)

Is this a known bug in 1.2.11, and is it fixed in later versions?

Here is my version info:

$ /opt/exp/sbin/tshark -v TShark 1.2.11

Copyright 1998-2010 Gerald Combs [email protected] and contributors. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compiled (32-bit) with GLib 2.17.7, with libpcap 1.1.1, with libz 1.2.3, without POSIX capabilities, without libpcre, without SMI, without c-ares, with ADNS, without Lua, without GnuTLS, with Gcrypt 1.2.2, without Kerberos, without GeoIP.

Running on Linux 2.6.33.3-85.fc13.i686.PAE, with libpcap version 1.1.1, Gcrypt 1.2.2.

Built using gcc 3.4.6.