Lightroom 4.1 - Shows 14 files to import/sync, then says none found

Question

I have Lightroom 4.1 for Win7x64.
When I right-click on the folder where I keep all my photos, and choose synchronize, it says I have 14 images to import.
I click import, it does it's thing, then says 'no photos or videos were found to import' and that's it.
Tried closing/reopening and trying again, selecting/deselecting the options in the sync menu and still says 14 to import, then nothing found.
... is there a way to 'flush' the database or something?
Currently downloading the 4.2 update... on a side note... what kind of "update" is 750MB???? seriously... most programs are smaller than that!

Answer 1

A LR for Windows update contains an installer for both the 32-bit and the 64-bit versions of LR, but you usually only install one of those.
I would guess that they are duplicates that have a different name from the initial instance of them, and the quick check during Synchronize doesn’t figure that out, but the more sophisticated check during Import does. 
One way to determine this would be to show the Import dialog and enable the Allow Duplicates and see if the 14 are available for import, then.  I’m not saying you should import them, just determine if they are duplicates.  If they are duplicates then you can determine if you want to delete them.