Setting up my new Flirc with a Harmony 900 remote worked fine, especially after reading the Harmony sticky thread. But I consistently and reproducibly experience the problem that apparently Flirc emits multiple key events for a single key press on the remote.
Example: pressing 1 on the remote results in three to five 1 appearing on the screen (terminal, editor, etc) and of course also in XBMC. I also observe a very short delay between the first (desired) event and the subsequent (superfluous) events.
Setting the interkey_delay to 0 results in exactly three events (two superfluous) occurring while setting it to 7 results in exactly five events (four superfluous). Again, this is completely consistent and reproducible on my systems.
Adjusting the inter-key delay for the Harmony itself using the configuration software doesn't appear to change anything. Currently it is set to 0.
Ubuntu 12.04 x86_64
Harmony 900 configured with Panasonic TC-P65VT30 profile
Flirc Version 1.0.2 [a3bbc3e70a32c4f2]
Firmware Version: 1 10-02-2011
Can I provide anything else?
Edit: I know there is a similar report () but there was no follow-up in the last half year and it also mentions the problem being not consistently reproducible.
Edit 2: For testing I upgraded to fw_wake_v6.bin (255.7 10-02-2011) but it doesn't make any difference. Behaviour remains exactly as described above.