I used to use BWP Google XML Sitemaps with Jigoshop fine.
Updated both BWP Google XML Sitemaps and Jigoshop to their latest versions and now the shop page comes up with a http error 500.
Disabling BWP Google XML Sitemaps gets the shop working again.
Not sure what would have gone wrong in either to cause this.
I opened a report on the Jigoshop forums about it here: