[XeTeX] Problems with spacing in math formulae

Khaled Hosny khaledhosny at eglug.org
Wed Oct 20 10:35:06 CEST 2010

On Wed, Oct 20, 2010 at 05:21:32PM +1030, Will Robertson wrote:
> On 2010-10-20 09:13:36 +1030, Khaled Hosny <khaledhosny at eglug.org>
> said:
> >I can reproduce it and while ago have seen it in a posted sample
> >somewhere on the web. I don't know what is special about Euler's
> >display summation to trigger such a bug (if it is actually a bug),
> Strange, with a little more effort I can now reproduce the problem,
> too. Apparently Font Book wasn't installing the latest version over
> the top of the old one correctly. I must remember to remove old
> fonts before I try and install new versions.
> So I can revert to the correct behaviour by installing an older
> version of the font with Unique Name: "FontForge 2.0 : Neo Euler :
> 18-9-2009" (quite a lot older, I know).
> Does this help track down the problem, Khaled?

Very useful! Knowing that there were a working version I was able to
track this down (with some git bisect magic), the culprit is the
DisplayOperatorMinHeight math parameter, while ago I increased it from
1400 to 2180 and XeTeX seems not to like that. Now I need to remember
why this was done in the first place (never use terse commit messages,
one day you will regret it).


 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer

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