I'm struggling to find anything on this one anywhere on either apple.com or the internet generally but I'm seeing a weird problem with Messages since I upgraded to Yosemite.
I can send photos with it fine, and they seem to be received as well, but they don't display "in line" as expected.
Interestingly, if I double click on the IMG_2360, the photo is sort of there, I just can't get at it. Double clicking does this:
However, I can't do anything from...