For some reason LaTeX is not working properly in my browser. I can see everything that is done in display mode, but anything that is between dollar signs does not parse at all. I've tried restarting and refreshing several times. Firefox seems to work perfectly fine. Anyone else have this problem and any idea how to fix it? Here's an example:
The math.stackexchange.com site recently has put the MathJax configuration block in the wrong location, and that produces a timing dependency that causes some people not to get the configuration changes that enable the dollar-sign math delimiters. Looks like Opera is one of the browsers that is affected by this.
See the MathJax documentation for details about where to place the MathJax configuration block.