[Elecraft] Remote operation question

[Jim - KE8G]

Hi All,
I seem to be having a problem with my RemoteRig operation.  Everything worked perfectly when I initially set it up.  While at the remote QTH, the only change I made was to add the newest firmware to the K3.  I have not updated the firmware at the K3 control station, would this cause a problem?  

I had a person tell me the rig sounds like it has a "defect."

Looking at things from the control end, the KAT500 & KPA500 both appear fine, no changes in SWR or power output.

Any ideas?

73 de Jim - KE8G