I have a multiple magento store with 3 x storefronts. 2 are working fine, the other is not showing any products in categories. 

I have done all the checklists, made sure they are in stock, allocated to the website, reindexed, to no avail. They show in the other storefronts correctly. 

I have tried changing theme to a RWD but they still dont show. Imported currency as above. 

disabled / re enabled product
out of stock / in stock
even checked database to make sure the product has the correct website id. 

They show in the category admin page as being in that category. 

Any advise would be greatly appreciated? 2 days now of clicking around and i'm going berserk.