iphoto - all photos disappear?

[The UnDoug]

You know, you can right click on the iPhoto file (forget which one exactly) and choose to open package, or some-such, and you should see all the photos and other files. Assuming they are there, make a back-up (if you don't have one), and then try re-importing them (start with a small group). If that works, then import them all.