I went out and first looked over bike from stem to stern. No visible damage. I then checked front and rear hubs. No real issues and though I will get wheelset trued on principle the wheels now seem straight with very slight - very slight - wobble to rear. All spokes tight. Brake pads not rubbing. Crankset is not loose. I have had a lock cable wrapped around the TT up against the HT for the past year. I took that off incase it was weighting the right side. I pulled the front wheel and reversed it. I then took a very short ride. It seems better. Possibly several minor corrections have added up to make it safer but I'm still not happy. I believe I will have to advance my rebuild schedule.
Tomorrow I will try adjusting the headset and see if maybe that is too tight. Just baffled how it could have magically tightened.
If it doesn't get better after that I may take it to a local frame builder and see if he has any ideas.