The quick way to see what your default menubar looks like (or the default for anything else), just log into your Guest account. It always starts with everything set to the default.
com.apple.systemuiserver.plist is one way to populate the menubar at login, but it's not the only way. They can also be added from your login items (System Preferences -> Users & Groups -> Login Items), or as launch agents ({~,,/System}/Library/LaunchAgents), or (rarely) added dynamically by any application you run.
Thanks, but I figured out the former and was aware of the latter before you posted, although my test user or, as the case may be, guest account would
not have started at default if MenuMeters lived in /Library/Preference Panes rather than ~/Library/Preference Panes.
But what does
{~,,/... mean? I've never seen that convention before.
