Emacs: I-search []:
Ctrl-S should normally start a search forward when using Emacs. But in Carbon Emacs (for Mac) this breaks, if you have U.S. Extended as one of the keyboard layouts on your Mac. In this case, instead of I-search: you get
I-search []:
in the status line below and cannot actually search. Choosing U.S. instead of U.S. Extended fixes this problem. 🙂