Does opening an image in a directory, and then clicking another image there (to re-use the same window), and then doing stuff cause the problem? Because I've found and fixed a bug relating to that already.
Also, I want AppleScripting too but it won't be in 2.0, I'm trying to polish that off and release it now without adding anything new. Also if somebody with more experience with AppleScript than me wants to help me out with it, that would be appreciated because I don't have much of a clue how it should be done.