after downloading iLife '11 iphoto does not open

Reading the Apple support Communities, I realized that many Mac users have the same problem

I have encounter after downloading iLife '11. My iPhoto does not open anymore and gives me

always the same answear:

iPhoto quit unexpectedly.

Click Reopen to open the application again. This report will be sent

To Apple automatically.

I Click Reopen and I get the same answear again and again......

Is Apple doing anything about this problem ?

Has anyone found a solution ?