[Pharo-project] DNU MIMEType>>#forURIReturnSingleMimeTypeOrDefault:

Hi, In Pharo-1.1-11411 these MIMEDocument guessTypeFromName: 'pharo.png'. MIMEDocument guessTypeFromExtension: 'png'. give a DNU for MIMEType>>#forURIReturnSingleMimeTypeOrDefault: Sven