Hi everyone! Once I install the Gallery add-on, I cannot add pictures into a gallery (I import a zip-file with pictures inside), the error message I get is as cryptic as this: • MessageNotUnderstood: UndefinedObject>>nextPutAll: • MessageNotUnderstood: UndefinedObject>>close I do not know how to make a debugger appear to give me a chance to fix it. Furthermore, it seems that Pier 1.2 removed the Installer class. Thus, I recommend changing the documentation of how to install the Gallery add-on here: http://www.piercms.com/doc/add-ons#248154888, as it refers to the Installer class. Cheers, Niko