My experience of "menu hang"
-No reason the metering menu pop up and prompt me spot or iESP mode
-when i want to change some setting like flash, accessories etc, the menu just halt at the main when i press menu button and disallow me to proceed further.
My "solution" to the above problem
-carry on shooting despite of the metering menu popping up. Still can take picture.
-Off and on the camera and immeditely go to the menu and change the setting i want. Works all the time though it's slow and i miss couple of moments which i hope to take it down digitally.
Inital thought was my battery holder "short circuit" or something. Took the battery holder off and still problem exist so bottom down to the camera itself. I don't have a chance to check the version thingy that Matrix mentioned as i use mac and only manage to see "Quicktime 6" instead of the version thingy.
Guess i have to send in both the camera and the battery-holder to have a through check instead of just the camera. Tough luck i guess, hope they can service it up asap as i have few events coming up soon.