Are you sure that you didn't insert these images with the "store by reference" option? What you describe sounds like a case where the system can't find the referenced image files, but that shouldn't be the case if you pasted the images onto the layout.
I just used the keyboard shortcut command-v for paste and pasted them right onto the layout.
Just basic copy from app and paste into another.
I thought it was a format issue, and so I tried both a jpg and png version of the same image, but I am not unconvinced that the Mac clipboard arbitrarily picks whatever format it wants to when it pastes.
Anybody have any ideas here?
This seems soooo basic?
I have seen this problem before, although it seems random. The only way around it is to give up on the copy and paste method. Create a jpeg or png file, then use the Insert --> Picture command in Layout view. AsPhilModJunk warns, make sure you do not check the Store by Reference box.