A friend wondered if it was possible to have Safari's built in google search do it's thing on google.ca instead of google.com.
So I searched the contents of the Safari package, found the instances of google.com in "/Safari/contents/MacOS/Safari" and replaced them with google.ca.
It no liked that. Safari wouldn't launch at all. Undid the change. Safari would bounce twice and crash.
Sigh. Downloaded a fresh copy. All's well again.
The moral: no google.ca searching from the menu bar. Though they probably should make that a configurable option: select which localised version of google the user wants to use...