Asp.net MVC page is giving Mime type warnings for image files

While I do not see any functionally or jquery UI elements affected by this, but when I access my asp.net mvc web page the chrome developer console is logged with a bunch of error messages like so:

Resource interpreted as image but transferred with MIME type application/octet-stream.

All of the warnings are for jquery UI images (though I don't have any custom images on there so I don't know if it's jquery UI only). All the jquery images still load correctly.

Does anyone have any insight on why this is happening?

Are you running your site from Visual Studio's built-in web server? Apparently, you don't have much control over the MIME types in that environment (see this). I was seeing the same behavior and was starting to stress about it before finally realizing that I wasn't even looking at the IIS-hosted application.