I just noticed that in several places, the tops of square root signs are missing. This behavior is almost, but not completely, consistent, e.g. in the screenshot below, the top of the symbol on sqrt(2) is fine, but the other two square roots are not - unfortunately that is exactly where the top of the symbol is most needed. Is anyone else seeing this?
Chromium 17.0.963.56 on Kubuntu 11.10 (same behavior occurs with Chromium 18.0.1025.39 on Gentoo)
"About MathJax" box:
using local STIX fonts
Origin of screenshot for a test case: https://physics.stackexchange.com/a/14702/7433