Thanks for answering, Chris - I've been on hols, so couldn't reply. I'll give the feedback here, you can move it to a more relevant forum/trim this post as you please.
I have actually had a fair amount of trouble with the flirc. I can program it wonderfully easy and put it to use with no problems.
Then.. after 3-6 hours of use, one of the buttons will "stick". Eg. I watch a few movies, then I push left on the remote and flirc sends out left endlessly. If I then press something else, eg. right or any other key that I've programmed in, THAT key repeats itself endlessly. I can get flirc to repeat any of the programmed buttons endlessly in this mode.
I could understand if there was some spurios IR signals that got in and triggered one key, but repeating whatever keypress I send to it endlessly, for me, suggests that there's a problem.
I can then take the flirc out of the USB port, wait until the next day, clear + re-program the flirc and it will work again for some hours until it gets stuck again.
I initially used my flirc on a 10m buffered/powered USB extension cable and I thought the misc error was because of power problems. I then put the flirc directly into a mobo usb port for testing/programming and it exhibited the same behaviour.
I am using firmware 1.00 and GUI 0.96 (as delivered by MannMadeMediaCentres) and I have not yet tried to upgrade the firmware/GUI as I can see people have had mixed results with this via this forum.
At this point in time, I am awaiting the finished firmware and new programmer utility as I hope this will fix my problem.
Just to clarify : I am using flirc on a windows pc, not R-Pi or any exotic creature.