Who can tell me why I am cut off from leaving comments? Spending the time to compose a comment then nothing showing up is rather irritating.
Problem "solved". Disable new "Mathjax Buttons" I loaded from a description on the right of the questions page. Fixes two different commenting problems here and on ElectronicsSE plus fixes problem with the Stackexchange pull-down menu to go to other SE pages.
Now to find how to reach the Mathjax Buttons author.....