Seems to me Tom that you have an antenna problem of some sort, from 
the coax connector on the back of the rig forward.  Is there a coax 
jumper from the rig to something that eventually feeds the various 
antennaes?  I think that a degradation in receive as well as SWR 
points at the antenna circuitry as the culprit, rather than software.
Just my guess.
Pat, K9JAUAt 07:12 PM 1/23/2013, you wrote:
>Hello everyone.
>
>This quiry is to all of you TS590 owners out there.
>
>Several times now, I have noticed something really strange with my TS590,
>the cause of which I can't exactly pinpoint.  In fact, it happened again
>last night.
>
>I was making some adjustments to my TS590, and suddenly, the receive
>sensitivity of the rig dropped.  In addition, I started getting some very
>weird SWR readings and output power readings as I went through the bands,
>and switched various antennas in and out.
>
>Since I had the ARCP590 software, and all of my memories and settings saved
>for ready reference, I did a full re-set of the rig, hoping it would correct
>the problem.
>
>When I was done with the re-set, the rig was still acting very strangely.
>
>So, I simply turned it off, and went to bed.
>
>This morning, I turned the rig back on, and everything was fine, as if
>nothing ever happened.
>
>My theory is that something is tripping some sort of circuit protection
>system in the rig, and that, once the rig is idle, things somehow re-set
>themselves.
>
>Again, I can't say for sure what I was doing that created the problem to
>begin with, but it didn't seem to be anything too significant.
>
>I'm just curious as to whether anyone else has had this sort of thing happen
>to them.
>
>Tom Behler: KB8TYJ