Since MathJaX got updated on MSE, I experience a lot of trouble with the spacing following formulae.See for example the spacing following $\dot C$ in the following picture.
The period following $\min \dot{C}$ appears to be inside $\dot {C}$, while the period following the next $\dot {C}$ is placed as expected. So far I seem to be unable to deduce the reason for these inconsistencies or resolve this issue.
Technical Details: I use OS X 10.11.4, Safari 9.1 and the HTML-CSS rendering option for MathJaX. Using any other rendering option (common HTML, MathML, Preview HTML or SVG), I could not detect a similar issue - everything seems fine.