Everything worked fine on Monday but tonight, a new problem. Tonight I noticed that my horizontal slider bar no longer works in game though there is no issue with the vertical scroll bar. I worked around it by doing control pings on the gm layer to move around the map... just a bit painful. I swapped to Firefox, same game, and no issue with the horizontal slide bar. Will see again tomorrow night when I run my next game to see if it was just a fluke or a continuing problem. Closing and restarting the browser, Chrome 53.0.2785.116, did not fix the problem.