Re: "Opera 32.0 which is based on Chromium 45"
Tried this with Chromium 37.0.2062.120 Ubuntu 12.04 (281580) (64-bit) (version, out of date, supplied with Ubuntu 12.04) and no problems. Guess this bug was introduced since then?
Same test for Firefox on this machine (40.0.3), no problems.
Same test for older Opera (12.16), also no problems. Tried new Opera, it lacked most of the good features of old one (the "turbo" proxy server is its only benefit) so went back. If I need more up-to-date support I have Firefox or can fire up VMs with other choices.