RICG Responsive Images on Dreampress


I have installed the RICG Responsive Images plugin on a Drempress instance, but it does not seem to be working, i.e there’s no srcset attribute in the img tags.

However, it’s working perfectly on a test server on a external shared hosting with the same set of plugins installed.

Is there any Dreampress features (caching?) that could cause a conflict? Sorry for the vague question. I’ve tried and uninstalled other possibly conflicting plugins, like W3 Total Cache, but to no avail, and I feel quite lost right now.

Thanks in advance