[NTG-context] hbar (and probably some other symbols) don't work in latest beta

Minimal example: \starttext $\hbar$ \stoptext Michael -- Michael Murphy Innovia Technology Ltd St Andrew's House, St Andrew's Rd, Cambridge CB4 1DL, UK www.innoviatech.com +44 (0)1223 248888 Registered in England 3763943 This email may contain confidential information.