[XeTeX] Problems with spacing in math formulae

[Will Robertson]

On 2010-10-20 07:52:09 +1030, Ross Moore 
<ross.moore at mq.edu.au> said:

> On 20/10/2010, at 6:14 AM, Christian Pech wrote:
> 
>> I already reported this problem a week ago, but maybe the message got lost.
>> The following latex-file produces wrong spacing when compiled with xelatex,
> 
> I confirm the bad layout, as reported below.
> This is using freshly download versions of  unicode-math
> and  euler.otf .

Strangely enough, I *cannot* reproduce this.
(I've had a similar bug report before.)
I suspect it's an engine bug. I'm using TL2010 on Mac OS X 10.6.

W