Using the MathML with SVG or PNG fallback mode of Google chrome fails to display if a vertical align attribute is set in the maths tag.
With the source
A<math style="vertical-align:-10%;">B</math>C<math>D</math>E<span style="vertical-align:-10%;">F</span>
ABCDEF should display, but the B does not appear. It seem that adding the attribute suppressed the creation of a default image. You can see this at
An article space example is https://en.wikipedia.org/w/index.php?title=Data_validation_and_reconciliation&oldid=594713351 a lot of the inline formula in the Data reconciliation section.
Things seem to work OK in the other modes and in the MathML mode on firefox.
OS: Mac OS X 10.9