I think this is a brand new problem so I am quite excited (or not).
Tonight I realised I didn't clean my computer in a while (3 months more or less), so I upgraded to the latest (free)version of Ccleaner.
"wow plenty of new options".
I didn"t touch anything, started the clean up. 2.2G freed later I try to log on facebook on my regular browser : firefox.
The page takes forever to load and finally appears without any css (just white background and black text). I still log on and it doesn't change anything, still no css.
Fair enough, let's try with chrome. Ok so with chrome I get the homepage ok but when I try to log on ... yeah no css again.
I check my hotmail account (which surpisingly still opens straight away, weird cause I cleared the cookies).
So I told to myself that the clean up prolly went wrong at some point, so I did it again.
Now I end up with no facebook and no hotmail (page desoen't even load).
Gmail is fine, other accounts on other websites are fine (tumblr took a while to appear correctly though)