A lot of the text, from the buttons on the header to the titles of articles, doesn't show up on the homepage for me. I tried hitting Ctrl + F5 which I believe is the 'hard refresh', but it didn't fix the issue.
After mousing over something, its text will begin showing, even if I mouse off of it afterwards.
This bug happens on Google Chrome, which I use primarily, but it doesn't happen on Mozilla Firefox. I'm running Google Chrome version 33.0.1750.154.
Here's a screenshot of how the homepage looks for me (my mouse is placed on the Forums button, but it doesn't show in the screenshot):