How Can I Identify LR image files with lost Associations?

[BradSmith]

I want to go through my big catalog and try to fix all of the lost file associations that I've caused through intermittent bad behavior of moving image files through my operating system rather than through LR.    Do I have a way of having LR show me all the files in my catalog which have lost their association with the actual file on my HD's?  I couldn't find a search or find or Smart Catalog criteria to find this "dis-associated" files. 

I keep coming across them as I work on old images, and my blood pressure goes up each time I find one.  I'd like to deal with them at one long sitting.

thanks
Brad

[MBehrens]

Library Module. Library Menu - Find Missing Photos
Creates a Catalog collection "Missing Photographs"

[BradSmith]

I'm using LR 2.6 and in the Library Module, under the Library Menu, there is no "Find Missing Photos" command.  Maybe that's in LR3??

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"Library Module. Library Menu - Find Missing Photos
Creates a Catalog collection "Missing Photographs"

[MBehrens]

Yeah, sorry. I'm on 3.3. A lot of good reasons to upgrade...