Intermittent flashing RX LED on my USB UIRT

Just curious.....
Every now and again when my HTPC is in S3, I notice the RX LED flash for what appears no reason. I know of no IR floating around my room, but of course something could be tx'ing...and the UIRT detects it...
Anyone else noticed this?
Every now and again when my HTPC is in S3, I notice the RX LED flash for what appears no reason. I know of no IR floating around my room, but of course something could be tx'ing...and the UIRT detects it...
Anyone else noticed this?