I use the blowery binary too but do not have any problems at all with Cute Editor, with or without the appsetting

Thanks, the appsetting worked great.
Mariette, could you post your config section for the blowery module? This was mine:-
    <httpCompress preferredAlgorithm="gzip" compressionLevel="high">
      <excludedMimeTypes>
        <add type="image/jpeg"/>
        <add type="image/gif"/>
        </excludedMimeTypes>
      <excludedPaths>
      </excludedPaths>
    </httpCompress>

cutechat wrote:

Yes , the resources of CuteEditor is gzip encoded , if you have install another http compression module , the resources would not be downloaded correctly . to fix this problem , you could add appSettings into web.config as :  <add key="CuteEditorEnableGZip" value="False" />