Is it possible to filter or search the library for photos that have been exported?
For example, maybe I wish to redevelop all of the pictures that I exported from LR3 using the new process in LR4 but rather than try to guess which keywords, etc, I've used, I'd like to search for photos that have at least one exported entry present in their develop history.
Or perhaps to search on other line entries in the "develop" column?