I'm using the plugin W3 Total Cache plugin to host files on my CDN (Amazon S3). Unfortunately, not all of my files are uploaded to the S3 bucket, although I don't get any error messages while uploading.
Specifically, some resized versions of the featured image are missing. The featured image itself is uploaded as well as the 75x75,150x150, 199x300,and 250x375 version.
The 140x140 px and the 400x500px version are missing, although they do exist in the /wp-contents/upload/2014/03 folder.
It seems, the plugin does not recognize those files.. what is causing this problem? I'm happy to provide more information if needed!
Thank you very much!