Tonight I noticed my X50 (rev 5, 41/05) scanning dot moving at approx one half of normal speed. As I passed a known K-band door opener, it did not alert. I drove out of the range of the opener and removed/restored power. The dot now moves at normal rate. I drove past the K-band opener again, but still no alert. So I continued along this time doing a manual RESET. Now as I approach the door opener my detector alerts at the usual range. There has never been any self cal or service required messages. Anyone else have this happen? It seems fine now but my trust has gone sour.