Add to Cart not working. Anyone else?

Ok, just in case this happens to anyone else. Before we had just  /OrderRetrievev2.aspx links to the shopping cart which was working fine.

However since it no longer worked today I added {module_shoppingcartsummary} to template and now all add_to_cart functions are again working with no further changes.

Just letting you know in case other's run into the same thing we did.

Looks like the update gave us more control over the format of  {module_shoppingcartsummary}.