I updated to 4117 this morning and my keyboard shortcuts were all broken.
If I typed Control-X it behaved as if I typed it twice. Same with Control-C. Control-Meta-F appeared to work, that is, behave as if I only pressed it once.
Here’s an example: “Control-X k” is supposed to kill a buffer, but instead it did the “control-x control-x” command and THEN inserted the letter ‘k’.
Downgrading back to 4116 solved the problem.