ifv=1 reports not rendering anymore?

There are many posts here about using &ifv=1 at then end of a report URL in order to render the report solely, without all the other elements of QB (object ribbon, reports, etc.).

This has many uses, including a way to get around the cap on the number of report widgets you can embed in a page.

As of over the weekend, these have stopped rendering in our applications - the embedded reports just look blank on these pages.  Does anyone know an alternative approach? 

Thanks!

------------------------------
Lucas Buxman
------------------------------