I’m using Sublime Text 2 and 3, and the same issue occurs in both. Control+backtick (defined as “Show Console”) does not register. From checking sublime.log_commands, it looks like this key is not being recognised at all. However, Control+single quote does work for “Show Console” - even though it is not defined as a key binding at all in the defaults.
This is with a UK keyboard (where backtick is on the top left key, just above tab, and single quote is on the key to the right of semicolon). I’ve tried a keyboard macro program, and it reports that backtick on my keyboard is virtual key 223.
Paul