Fractions in small font size when they are inside <mtable>

[samimaattaCelia]

I noticed that fractions appear really small when they are rendered inside the <mtable> element compared to "free flowing".

Here is an example:

At least I couldn't figure out how to make the fractions bigger. Any ideas?

I think this might affect other expressions as well when they are inside a <mtable>. Same thing happens in Firefox.