New Post: makethumbnail.ashx issue after DNN upgrade

Hello, I am testing an upgrade from DNN 6.1.4 to 7.3.3. The only issue I am running into is the thumbnail generator. No images are displayed and the ocnsole in Chrome gives this error:

Resource interpreted as Image but transferred with MIME type text/plain: "http://extremeledlightbars.azurewebsites.net/DesktopModules/NB_Store/makethumbnail.ashx?Image=271&w=140&tabid=542&h=0".

You can see for yourself here:
http://extremeledlightbars.azurewebsites.net/Products.aspx

Note that though this is on Azure, it is doing this on my Windows 8 desktop as well.

Thanks in advance!
Chad