If this is really a problem unrelated to user error, perhaps the source of the difficulty is with your browser. I use Safari with the pop-up blocker engaged, but thumbnail pictures on this Forum open as a new browser page, not as a pop-up so images can be seen at full size simply by clicking on the thumbnail. Also, Firefox behaves just like Safari.
Perhaps other browsers behave differently.
Mike Young & Rosemary Nelson
Bowlus Road Chief "Endymion" (coming soon)
BMW X3 xDrive 28D