It works for single characters, not over braces and brackets though. But 
that's what it was important for for me.

\starttext

   \overbar{1}
   
   $\overbar{1}$
   
   $\bar{a}$
   
   $\bar{(abcd)}$
   
   $\bar{\left(abcd\right)}$
   
\stoptext

Thanks though Henri.


On 9/26/2017 12:33 AM, Henri wrote:
> Not a solution, but in math mode you should use $\bar{1}$ which is the proper math accent.
>
> On Mon, 2017-09-25 at 23:51 +0200, Sebastian L. wrote:
>> Hi fellas,
>>
>> after some recent beta change some of my documents differ in output
>> compared to past builds, when it comes to \overbar command in math mode.
>> MWE:
>>
>> \starttext
>>
>>     \overbar{1}
>>     
>>     $\overbar{1}$
>>     
>> \stoptext
>>
>> In math mode the example looks broken... Did I miss a change; is there a
>> new method for overbars in math mode?
>>
>> Greetings, Sebastian
>>
>> ___________________________________________________________________________________
>> If your question is of interest to others as well, please add an entry to the Wiki!
>>
>> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
>> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
>> archive  : https://bitbucket.org/phg/context-mirror/commits/
>> wiki     : http://contextgarden.net
>> ___________________________________________________________________________________
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________