$ E [ w ] = 1 $

\stoptext

produces

Eaw]=1

using my context (current version: 2013.03.29 01:03). Needless to say that the MWE works as expected on the Context live @ contextgarden.

I have no clue as to how to go about debugging the problem. So did a fresh install in a different directory but still get exactly the same result.

I will be grateful for any suggestions on how to identify the problem in my context installation.