Tried that too .. I see the following errors in console when I try activating airport status or menu meters
2007-08-03 16:15:42.492 SystemUIServer[236] *** -[NSURL initFileURLWithPath:]: nil string parameter
2007-08-03 16:15:57.002 SystemUIServer[236] *** NSRunLoop ignoring exception '*** -[NSURL initFileURLWithPath:]: nil string parameter' that raised during posting of delayed perform with target 3075b0 and selector '_loadMenuBarExtras'
DOCK: CFMessagePortSendRequest returned -2
2007-08-03 16:18:45.888 SystemUIServer[236]
MenuCracker
see
http://sourceforge.net/projects/menucracker
MenuCracker is now loaded. Ready to accept new menus. Ignore the failure message that follow.
2007-08-03 16:18:45.901 SystemUIServer[236] failed to load Menu Extra: NSBundle </Library/PreferencePanes/MenuMeters.prefPane/Contents/Resources/MenuCracker.menu> (loaded)
2007-08-03 16:18:45.902 SystemUIServer[236] MenuCracker: Loading 'MenuMeterCPUExtra'.
2007-08-03 16:18:46.305 SystemUIServer[236] MenuMeterCPU loaded.
2007-08-03 16:18:46.349 SystemUIServer[236] *** -[NSCFString setLength:]: selector not recognized [self = 0x3ad700]
2007-08-03 16:18:46.349 SystemUIServer[236] Exception raised during posting of notification. Ignored. exception: *** -[NSCFString setLength:]: selector not recognized [self = 0x3ad700]
2007-08-03 16:21:24.993 SystemUIServer[236] MenuCracker: Loading 'MenuMeterMemExtra'.
2007-08-03 16:21:25.070 SystemUIServer[236] MenuMeterMem loaded.
2007-08-03 16:21:25.096 SystemUIServer[236] *** -[NSCFString setLength:]: selector not recognized [self = 0x382240]
2007-08-03 16:21:25.096 SystemUIServer[236] Exception raised during posting of notification. Ignored. exception: *** -[NSCFString setLength:]: selector not recognized [self = 0x382240]