Error in contacts since build 1068

Since build 1068 I experience an error when I want to create a new contact (see attached screen print). When I click OK, I get the default screen lay-out and not the designed (and translated) one I created. The same with existing contacts, but then the error is not displayed, I only get the default lay-out.

(translation in the error message: ‘Te veel tekens in tekens-literal’ = ‘Too many characters in character-literal’)