Here's a bunch of interesting questions.
1. Does the involvement of (certain kinds of) luck interfere with representation? Suppose, for instance, that I have a drawing in front of me which, considered as a road map of a small town in Wales, would serve as an accurate guide. But suppose it is purely coincidental that the drawing has this feature - it was produced as a circuit diagram. Does the drawing represent the road layout of this small Welsh town?
2. If accidental representation is not possible, is the kind of accident that prevents representation from occuring analogous to the kind of accident which prevents some true beliefs from being knowledge?
3. If accidental representation is possible, what (if any) are the conditions on representation which prevent it being the case that (e.g.) any two resembling things represent each other?