I don't know, guys. I have been using firmware rev 3.824 on my V1 since last June and I still have yet to see this thing junk out a real Ka alert. About 10 minutes ago I had probably the longest Ka encounter ever and still nothing. A LEO running constant Ka pulled out in front of me so I followed him for about a quarter mile. He then pulled into a fire station and then back out behind me after a little while, catching up with me for 2-3 miles. So we're talking at least one minute while the signal was ramping up followed by 2-3 minutes listening to it at full strength. That would have overloaded it if anything were going to.
I'm not exactly sure what make/model of unit this town uses, but the dual antennas are very small cylinders which are generally mounted outside of the cruiser near the "B" pillar.
Either I'm not running into the right frequency of radar that it takes to cause a false "J", or there's something about my version of V1 that's preventing the problem from occurring.