I have been an emacs user for many years. For the last months (might be a year or longer) M-c is do not capitalize the next word as described in the documentation, but call up Calc.
How do I get the default (Capitalize next word) back to M-c? If I want to use Calc I can do M-x * c Regards Johann -- Because experiencing your loyal love is better than life itself, my lips will praise you. (Psalm 63:3)