I am seeing what looks like the identical problem, also on 10.4. My USB parallel port adapter reports the same model number; perhaps that's a clue.
[ 192.635352] usb[1946]: segfault at 0 ip 00007f1b79fd5b44 sp 00007ffffa6e1b68 error 4 in libc-2.11.1.so[7f1b79f4f000+17a000]
Bus 005 Device 002: ID 067b:2305 Prolific Technology, Inc. PL2305 Parallel Port
I am seeing what looks like the identical problem, also on 10.4. My USB parallel port adapter reports the same model number; perhaps that's a clue.
[ 192.635352] usb[1946]: segfault at 0 ip 00007f1b79fd5b44 sp 00007ffffa6e1b68 error 4 in libc-2. 11.1.so[ 7f1b79f4f000+ 17a000]
Bus 005 Device 002: ID 067b:2305 Prolific Technology, Inc. PL2305 Parallel Port