Back Up and try rebuild the library: hold down the command and option (or alt) keys while launching iPhoto. Use the resulting dialogue to rebuild. Choose to Rebuild iPhoto Library Database from automatic backup.
If that fails:
Download iPhoto Library Manager and use its rebuild function. This will create a new library based on data in the albumdata.xml file. Not everything will be brought over - no slideshows, books or calendars, for instance - but it should get all your albums and keywords back.
Because this process creates an entirely new library and leaves your old one untouched, it is non-destructive, and if you're not happy with the results you can simply return to your old one. .
I'm having the same problem.... I tried the option above and it's not working.'
I have a MAC OS version 10.6.8 and I-Photo version 9.2.3
I have my Mac since October and everything worked well with Iphoto untill a recent update
Since, impossible to get into Iphoto and it seems like I lost most of my pictures but the faces ones
I followed someone's advice and uninstalled IPhoto... then re-installed it (it cost me 14.95 $) but the problem is the same..
HOW can I get Iphoto to work again.... I know it's a problem that a lot of people have because of some update and plug-ins
Thanks for your help