I would really like these things to work. If it helps, I have noticed a few "odd" behaviors I'll share:
I have three old Dell Optiplex 755's running Linux Mint 17 and XBMC 13.2 with a flirc at each one:
#1 continues to get "sticky key" regardless of which port it is in (i.e. I select up in a menu and the menu items continue to scroll up extremely fast. If i let it sit a little, it will stop until i press another key only to begin the process again).
#2 was doing that until I moved the flirc to another port and rekeyed it. After relocation, it is sluggish requiring several key presses to move.
#3 worked from day one without issue.
I noticed if I had the flirc located in the front of the PC, the problem seemed to happen all the time. If I moved it to the back, the problem went away (for a little while on #1; it is now back).
I am a NOOB to all of this, but can manage to get some logs and revision levels if you can tell me specifically what you want, how to get it and where to send it...