I too have noticed the strange signals on 460.125, and as near as I can tell, the noise is coming from the Salt Lake County school buses on 155.205 somehow getting into the statewide repeater. When I hear the voices and bits of audio on 460.125, what I hear is the same voices and audio that's also on 155.205. The only thing I can think of is that the repeater for the Salt Lake County school buses is at the same location as the repeater for the old UHF statewide link. Sounds like someone needs to put a PL tone on one or both of the repeaters to prevent the signals from mixing!