Messing around with AJE I ran into a curious little bug. Nothing game stopping, or even very problematic, but still a bug....
If you examine a unit, and pop up the unit (element?) screen, you get a nice picture of the unit in question. If you do this for a fleet unit, then close the pop up and go to the unit buying screen (by clicking the bird), all unit pop-up windows show the picture of the fleet, with the picture of the actual unit you are examining ghostlike above it... Looks like a cache isn't cleared correct for the fleet picture. Only way I could get rid of it was by examining a non-fleet unit in regular map mode.
(as an aside: you can pop-up the unit detail window for existing units by clicking their type-of-unit icon. This does not work for units you want to buy - here you need to click the element in the lower right hand corner of the screen. Not a bug, but certainly an interface oddity. Switching between the two modes, I kept clicking on the unit type icon to pop up the detail window, while in buy mode....).