I receive " ... you've reached maximum download limit for non google format ... " very often. This occurs on both of my Trusty installations (this is NOT new - I remember it happening in 12.04, and 13.04 also). I've tried to clear cookies and cache but neither 'fixes' the situation. My solution this fae has been to launch FF and view the documents without issue.
Certainly this is simply an annoyance as I have a work-around, but I'd like it to be seemless.
HP | Intel iCore 7 3.2Ghz | 12 Gb mem | SSD Win7 | HDD Trusty
Dell laptop | Intel iCore 3 2.1Ghz | 4 Gb mem | Win 7 + Trusty