Reproduced on Windows XP, Inkscape trunk revision 10948.
Your issue appears when you try to save as JessyInk zipped PNG with a document that has no layer (the objects are directly under the root SVG element).
Workaround: always use a template with at least a layer (such as the default template in File>New.
Reproduced on Windows XP, Inkscape trunk revision 10948.
Your issue appears when you try to save as JessyInk zipped PNG with a document that has no layer (the objects are directly under the root SVG element).
Workaround: always use a template with at least a layer (such as the default template in File>New.