Question: [counting](https://math.stackexchange.com/questions/tagged/counting "show questions tagged 'counting'") currently has 13 questions bearing this tag. Should [combinatorics](https://math.stackexchange.com/questions/tagged/combinatorics "show questions tagged 'combinatorics'") and [counting](https://math.stackexchange.com/questions/tagged/counting "show questions tagged 'counting'") be merged, or one be made a synonym of the other?

Answer: 
UPDATE:

New OTF font files have been downloaded and applied to all installations where MathJax is used. If you are still having trouble **clear your browser cache**. 

> 
> Davide and Sean were able to update
>  the MathJax fonts, and we just posted
>  an update at mathjax.org. See
>  <http://www.mathjax.org/download>.
> 
> 
> Davide also updates the fonts.zip file
>  in our github repo and in the
>  SourceForge SVN rep. The only
>  difference is the updates for Firefox,
>  so if you get the above patch file,
>  you don't need to download the whole
>  fonts.zip.
> 
> 
> 

It appears that members of the MathJax team are aware of this and are working on a fix. 

<https://github.com/mathjax/MathJax/issues#issue/22/comment/601772>

> 
> OK, I've looked into it, and it seems
>  this is not going to be easy to fix
>  (it is going to take more exploring
>  than I have time for at the moment).
>  On the other had, I do have an interim
>  solution: it seems that FF is unhappy
>  with the OTF versions of the fonts,
>  but it is able to load TTF versions.
>  We don't currently have them in the
>  fonts distribution, but I do make them
>  (as part of the creation of EOT
>  versions), and these do seem to work
>  with FF4.0b as well as 3.6.13. It is a
>  straightforward change to include the
>  TTF versions and have FF use them for
>  v3.6.13 and above. (Do we know that
>  this is the version where it came into
>  play?) So there is at least a
>  solution. I will still work on
>  figuring out what is wrong with the
>  fonts and how to fix it, but I'm not
>  really a font expert, and it takes me
>  a while to work through it.
> 
> 
> 

**UPDATE:**

> 
> From: robertminer
> 
> 
> The current plan is to put out a
>  workaround that uses ttf fonts in the
>  affected versions of Firefox hopefully
>  tomorrow, Saturday, Dec 11 for folks
>  like gdalgas for whom the problem is
>  mission critical. That will likely be
>  in the form of a couple line patch to
>  a JavaScript file, along with the
>  necessary ttf fonts which will have to
>  be deployed along with the existing
>  .otf fonts
> 
> 
>
I just upgraded my Firefox from 3.6.12 to 3.6.13(Mac OSX 10.5.8). I'm able to reproduce the problem. 

It seems it takes FF forever to load the math font.

![alt text](https://i.stack.imgur.com/gjdGE.png)

But eventually the font does get loaded. 

![alt text](https://i.stack.imgur.com/dWcWR.png)

However I noticed the font is now a sans-serif type. Where as before, and currently in other browerser it is(and should be) a serif type.

![alt text](https://i.stack.imgur.com/nxID3.png)

I'll look into this. I suspect this isn't an isolated issue with Math.SE. Seems like a FF 3.6.13 issue. I wonder if other sites that use mathjax are affected as well?