[NTG-context] textext error

I am afraid a serious error has been introduced into textext in the last update(s). This used to work in metapost for typesetting text with a %-sign: label(textext("66\%"), origin); Now the % somewhere ends a line prematurely because the job aborts with: ! mpx file ended unexpectedly. Can Hans please repair this, suddenly a lot of my typesetting is broken. Hans van der Meer