Last modified: 2014-04-11 00:36:07 UTC
The contents of the <style> tag in the page body are garbled, with lots of U+FFFD replacement characters indicative of a character encoding issue. The /* cache key */ comment at the bottom is always legible, so perhaps this is an issue with CSSMin.
Apparently that self fixed and the beta cluster bits cache got wiped to clear the cached invalid versions. Not sure whether we can find the root cause of that issue, might want to mark it fixed. Else we could use a test to attempt to reproduce the issue.