Images are worth a thousand words, so here are 2 screenshots of the issue.

http://i.imgur.com/AF9fR.jpg

http://i.imgur.com/kEE2b.jpg

This started happening today on the latest Firefox version (16.0.1). Of course, I tried disabling every addon/plugin (this changed nothing). I tried a brand new version of Firefox, I deleted the whole browsing history/cookies, etc. No success.

Internet explorer has no problem (though somehow, the comments' text is all underlined).

Machines' info:
Windows 8 64bit professional (RTM version, MSDNAA)
Bitdefender Internet security 2013
Pretty powerful machine if it matters, i7 3770K, 8GB fast ram, ssd, etc.

The same thing happens on a windows 7 64bit professional (virtual machine) and on a windows xp 32bit professional (virtual machine).

Did I forget to give out any important detail? If so, please tell me and I'll rectify that.

Thank you for your time.

same for me

I have firefox 15, same thing happened.
Also, mozilla took back back ff 16 because of massive potential security loopholes, you might want to downgrade until they publish the improved version. I read that on arstechnica, so it's a pretty good source.

Thanks about the tip on the security hole, but I updated 2 hours ago, and it seems that Mozilla put up a fix very recently.

Here's an article about it.
http://news.cnet.com/8301-1009_3-57531010-83/mozilla-rereleases-firefox-16-after-fixing-critical-flaw/

Since I downgraded as soon as I read your message though, I won't be re updating today. I'll do that sometimes later.

I have 14.01 and have this and this bug.