Updating Missing Thumbnail Images for Purchased Content

Hi All,
Every once and a while, I will download content that will show up in my Smart Content Tab, but
the actual thumbnail will not appear. What can I do to have that image appear in the Smart Content Tab?
There is just a gray thumbnail with an exclamation mark and title, but no picture. Please advise.
Thank you!
Comments
There is a known issue that is being looked into, though a few items have had a bad/missing thumbnail regardless of store issues in the past.
Okay, I'll be on the lookout. Thanks for letting me know.
This is happening for all of my content. I hope this is fixed soon.