wp-content showing as %E2%80%A6ent in test path with 404 error

[Andy5000]

I was thinking of omitting the css files from the wp-supercache files seeing as they seem to be the only ones that get their paths messed up. With most Javascript to footer plugins, I have to omit 3 or 4 of the files which I haven't had to do with this plugin. My understanding is that a Javscript will block, but css will download in parallel with the content (I'lll be adding in the missing keep-alive header)

Edit I added:
Header set Connection keep-alive

as the 2nd line in htacess but it didn't work. Is their another line needed to actvate an apache module to do this, or do I need to check with the hosting company?