has anybody encountered issues with pinterest and urlencode?

basically items will pin just fine.

but if someone clicks on the link in pinterest they are directed to:

index.php?main_page=product_info&products_id=285

instead of:

index.php?main_page=product_info&products_id=285

I have always used urlencode for the url in the pinterest button. Until recently that worked fine. Now obviously it gets a product not found message. The various modules out there seem to do exactly the same thing so this can't be unique to me.

Any thoughts