I get a segfault when I try to send a command to iguanaIR usb device via irsend command. Then again, I get another segfault, when I use iguanaIR (compiled from their source) command igclient --receiver-on --sleep 100 to test the IR receiver.
I can't really code or even read backtraces, but here are backtraces for the ones who can :)
The box is running debian stable, I've compiled lirc version 0.8.6 and iguanaIR 1.0pre1. The actual usb device worked on another box, so I have no reason to suspect faulty device.