The tool-tips for access keys are always wrong on some systems.
I'm looking into a quick heuristic that will get the tool-tip
right most of the time (by checking the user-agent string).
I can speak for Firefox and Safari on MacOS X (which use CTL).
If you can verify the access key(s) used by another system and
browser configuration, please add a comment to this task.
I'll put together a darcs patch when I have enough data points.