Hello. All Wikimedia projects which use wgCategoryCollation setting for collations has been failed. These sites show unrelated header characters on categories.
Examples:
On fa.wiki:
http://fa.wikipedia.org/wiki/رده:استانهای_ایران
On ckb.wiki
http://ckb.wikipedia.org/wiki/پۆل:ئەلفوبێی_کوردی
On pt.wiki:
http://pt.wikipedia.org/wiki/Categoria:História
Version: unspecified
Severity: major