Can't boot from recovery partition in Mountain Lion

I've installed Mountain Lion on two different boxes so far: a 20" iMac at home and a Mac Mini at work. Both had up to date Lion installations prior to the upgrade. After installing Mountain Lion I am not able to boot in to the recovery partition on either one. Whether I hold down Command-R to go directly to the recovery parittion, or simply hold down Option to get a choice of boot devices, I am taken directly to the login screen.
The recovery partition is there on both boxes, and I can mount it and examine it using 'diskutil' from the command line. I created a USB image of the recovery partition on the iMac, and the Startup Disk control panel allowed be to select it as a boot device, but the box (both boxes, actually; I also tried it on the Mini) booted directly to the login screen.
I honestly don't know whether I could boot to the recovery partition prior to upgrading to Mountatin Lion or not. When I first installed Lion on the iMac I did not get a recovery paritition, but Apple sent me a USB drive and after cleaning up the disk (getting rid of an unused Boot Camp partition) I was able to get a clean install with a functioning recovery paritition. However I never booted from it after confirming that it worked.
Anyone else see anything like this? Or have an idea how to fix it?
- Larry

Ok but you can get the Option key to work.
There is a utility to Rebuild the recovery HD partition.
Look here first.
Removing and rebuilding a malfunctioning Recovery HD partition « Der Flounder
Then in that article a link to download or find the Recovery HD utility on the Apple website.
But that was originally for Lion. So you may have to rebuild the Lion R-HD then Reinstall Mt Lion over the top of your current install of Mt Lion for it to make the Mt Lion R-HD.
Depending on the age of your Mac's you may also be able to use the Online (Internet) Recovery HD system. To get to that with a R-HD partition on the system, even if that R-HD partition sin't working, you hold down Command+Option+r keys when starting the system (And yes with the USB keyboard attached).

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i have MacBook Pro 13" middle 2009, with ML 10.8.1. i want to make dual boot with windows 7 but always stuck on booting.
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paolo_italy wrote:
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