In several themes' config.php files the stub for $THEME->renderrerfactory is incorrectly stated as $THEME->renderfactory. If you don't notice, this will result in a theme renderrer not working and no error messages.

Applies here: (grep search)

arialist/config.php:252:// $THEME->renderfactory
binarius/config.php:247:// $THEME->renderfactory
boxxie/config.php:221:// $THEME->renderfactory
brick/config.php:243:// $THEME->renderfactory
canvas/config.php:262:// $THEME->renderfactory
formfactor/config.php:227:// $THEME->renderfactory
fusion/config.php:248:// $THEME->renderfactory
leatherbound/config.php:236:// $THEME->renderfactory
magazine/config.php:202:// $THEME->renderfactory
nimble/config.php:248:// $THEME->renderfactory
nonzero/config.php:247:// $THEME->renderfactory
overlay/config.php:242:// $THEME->renderfactory
serenity/config.php:108:// $THEME->renderfactory
sky_high/config.php:246:// $THEME->renderfactory