po_translatable_pages is unstable on boum.org
When we merged #9279 (closed), the po_translatable_pages configuration had
inc/stable_i386_iso_size_*_unit. This worked when building the website
on Tails but produced
when building on boum.org.
We changed to
inc/stable_i386_iso_size_mb_unit or inc/stable_i386_iso_size_mib_unit and refreshed all the page and it got
fixed. But then broke again with the release of 1.5.1
We should try to reproduce this behaviour in ikiwiki from sid and track that bug down before the next release!