pfSense

Same thing happens in Google's Chromium browser as Mozilla's Firefox on Xubuntu Long Term Support v 14.04 'Trusty'. So, there's two 'off the shelf, out of the box' "vanilla" ubuntu browsers written by two entirely separate groups pfsense gui doesn't work with that will be around for at least two years. Might be worth re-assessing rejecting this. However pretty 'Tahoma' is, can it be worth it?

Tahoma missing is NOT a Linux issue. You must be kidding. The Tahoma font is not freely licensed in the first place. Your "open source" firewall now requires a non-free MS font to be administered from OSS systems? Please, get back to senses (not behind electric fences). Also, the CSS cached fiasco could have been avoided by properly configuring the Expires headers on the pfSense's lighttpd. I also note a total lack of testing. Well done.

We did test it quite a lot, but we don't have a copy of every Linux distro out there to test against. It worked fine on Ubuntu 14.04 and some others (IIRC a few copies of Mint and similar), but everyone's installs are different, some may have had add-on fonts installed, etc. We're looking into the best path for a fix. We intended to implement URL fingerprinting to force a fresh copy of the CSS to be reloaded, but there wasn't enough time to do that properly for 2.1.5.

For most, clearing the cache or simply reloading the page is enough. For the others, we're already working on figuring out the best way to resolve the problem.

I'm using Ubuntu 14.04 and have this issue with both Chrome and Firefox. Caches have been cleared, etc.

See https://forum.pfsense.org/index.php?topic=81165.0.

It was working fine prior to the addition of the Gold menu item.

I cleared the issue by doing a hard refresh of the page

Ctrl-F5

While this doesn't fix the initial cause of issue, it does allow me to have proper functionality of the menu again. It was also a lot faster/easier then installing the non oss Tahoma font as others have mentioned.

pfSense 2.1.5
openSuse 13.1
Firefox 31.0

Neither a hard refresh nor clearing the cache seems to fix the issue for me atop Ubuntu 14.04 in either Chrome or Firefox.

Please use the current/open ticket #3842 and not this incorrect/old ticket. Be sure to read it first, along with other existing forum threads such as https://forum.pfsense.org/index.php?topic=81049.30