This problem has persisted for too long and instructing a seller to upgrade their version of Firefox is not a solution since the seler cannot instruct buyers who have to wait for minutes for their listings to load to do the same.
The solution for sellers is to disable the automatic store insert from Auctiva and edit your listing to insert the store code themselves. I use the code from a listing I did in July and the errors went away. If I use the current code that is obtained from Auctive the problem persists. So please remember you have to use the code from a few months back
The solution for Auctive is to treat the problem with some urgency since listings taking minutes to load and generating scripting errors will cost us potential sales.
It does not seem to be a Firefox problem because the older code works well in all versions of FireFox. And even if it is a Firefox problem its not a solution instructing us to upgrade Firefox because we cannot instruct all the eBay community that uses Firefox to do the same.
Regards