We actually still had cases of Meta strip duplication resulting in non-unique strip names. Quiet surprising this went unoticed for so long. :( Fixed that bug, and think it was last one (at least, no other case of SEQ_DUPE_UNIQUE_NAME usage should be broken, I think...), and raised subversion and updated doversion to run uniquename check on strips on all previous fileversions. Note: will have to do that again when merging in 2.8...