Forums stopped working in some browsers

A couple of weeks ago the forms here stopped working for me in certain browsers, in particular:

  • Chromium 37.0.2062.120 on Ubuntu 12.04
  • HTC browser 7.20.2614322859

If I go to the forums, no active threads show up, and if I follow a link (as in email) to a specific thread, the original post appears, but no follow-ups.

It works in Firefox on the same Linux system, and it works in Chrome on the same HTC phone as the default browser named above. But, I prefer Chromium on the one and the HTC browser on the other.

FWIW, here are some errors I get in the Chromium console when loading the Forums page: