I run a stock zenphoto, and stock zpMinimal theme. When I click on a portrait-oriented image it opens full-sized in 'colorbox' but it is oriented in landscape.

In other themes, such as effervescence (?) and Default the full-sized image appears oriented correctly

Is there a setting I have overlooked?

Is the image correctly rotated or is that info only in the meta data? If the latter it might be bypassed if calling it directly (might depend on the browser as I am not sure they even use meta data for image display).