Question: Messages does not have permission to open photo
I just upgraded to Yosemite today and now I am getting a strange error I've never seen before in Messages. Basically if someone sends me a photo (or I send a photo using my iPhone and then look at the conversation on my mac) I see a link to the photo instead. If I try to open it I receive the error - "The application 'Messages' does not have permission to open 'IMG_4042.jpeg'."
Any ideas? Everything was working fine in Mavericks..
MacBook Pro, OS X Yosemite (10.10)