I am using W3 total cache, and activated Cloudfront CDN with it.
The website gtmatrix says that my images at cloudfront.net does not have expire headers
Leverage browser caching
The following cacheable resources have a short freshness lifetime. Specify an expiration at least one week in the future for the following resources:
http://xxxx.cloudfront.net/wp-content/plugins/commentluv/images/closeit.png (expiration not specified)
Has anyone experienced similar issue?