There is a way; I got this from another user on this forum:
"Here's a quick workaround.
Open the photo in Quicklook. Hold down the button that reads 'Open with Preview', and you get a downdown menu that offers Add to iPhoto as the second option.
Choose it, and the photo gets added to iPhoto.
Annoying,but not so bad a workaround."
Wow... I'm surprised that people actually give them credit for simply *acknowledging* a bug that should never existed in the first place? Over 5 months now and still no fix. It makes me sad since Apple is historically so reliable and free of dumb problems like this. Instead of realeasing new fangled half baked stuff, it would be wonderful if they would focus instead on making the existing platform as rock solid as past releases. We don't care about new features when the most useful existing ones suddenly stop working.