Valve just released a beta version of the long awaited Panorama UI.
When this update is released it will more than likely break because it completely replaces the inspect function which is used to render screenshots.
I don't know when this will happen, but you can get a list of the screenshots you requested here:
Download them if you want to keep them. No idea when Vale will release the update, but better safe than sorry ;)



Steam Wizard

available in the chrome webstore

This chrome extension was created in cooperation with
It allows you to check floats and request screenshots directly from the steam community market

The source code is available on Github