Two of the updated tutorial files in lp:inkscape/0.92.x r15302 render no visible content in normal as well as in outline view (the content is there, and can be selected with <TAB>, inspected in XML Editor, and is listed in the Objects dialog):
* Help > Tutorials > Inkscape: Advanced
* Help > Tutorials > Inkscape: Calligraphy
Both files render as expected in Inkscape 0.92 r12599.
Two of the updated tutorial files in lp:inkscape/0.92.x r15302 render no visible content in normal as well as in outline view (the content is there, and can be selected with <TAB>, inspected in XML Editor, and is listed in the Objects dialog):
* Help > Tutorials > Inkscape: Advanced
* Help > Tutorials > Inkscape: Calligraphy
Both files render as expected in Inkscape 0.92 r12599.