The last two, I don't care... but the first one, what the heck!
I looked at the file... it's related to plugins_public... bad grade mostly come from jquery.
Specify a cache validator
The following resources are missing a cache validator. Resources that do not specify a cache validator cannot be refreshed efficiently. Specify a Last-Modified or ETag header to enable cache validation for the following resources:
Images were uploaded within UNA media uploader. One is on homepage for Unauthenticated. Last one was uploaded via Studio>Site Icon... this one is 'favicon'.
Ok, next... when we unticked CSS and JS caches...
Inline small CSS
Avoid CSS @import
There are couple of files that are rather small. Why is UNA being lazy using @import? Come on , dudes! Anyway, I managed to copy a couple from template and modify a bit at any custom template such as decorous, lucid, ocean, protean. The results has improved a little bit.
Will there be cleaning up in the future?