after selecting the experimental HTML5 generation (Preferences → Setup → Advanced Mode → click in front of generate HTML5? (experimental) → Save Setup), the wiki is refreshed (see below), but stays in XHTML 1.0. A new visit to the Advanced Mode Setup shows the option unselected…

Here is the output after clicking on Save Setup:

generating wrappers..
successfully generated /home/b-po-test/public_html/ikiwiki.cgi
successfully generated /home/b-po-test/source.git/hooks/post-update
refreshing wiki..


-- Charles Plessy

You found a bug in ikiwiki. fixed! --Joey