Since september if some action creates too long automatic comment (page protection, mass edits reverting...) in ruwiki, this comment not crops, but entirely removes, see https://ru.wikipedia.org/w/index.php?title=Википедия:Именование_статей/Иноязычные_названия&diff=prev&oldid=65843747 (page protection). Perhaps the reason is that the Cyrillic chars occupy 2 bytes in UTF-8 - before that this chars were cut off in the middle and turns into a "question mark in rhombus" symbol, since the beginning of the problems I have not seen this symbol. More examples on [[ https://ru.wikipedia.org/w/index.php?title=%D0%92%D0%B8%D0%BA%D0%B8%D0%BF%D0%B5%D0%B4%D0%B8%D1%8F:%D0%A4%D0%BE%D1%80%D1%83%D0%BC/%D0%90%D1%80%D1%85%D0%B8%D0%B2/%D0%A2%D0%B5%D1%85%D0%BD%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9/2014/09#.D0.A3.D1.82.D0.B5.D1.80.D1.8F_.D0.BE.D0.BF.D0.B8.D1.81.D0.B0.D0.BD.D0.B8.D1.8F_.D0.BF.D1.80.D0.B0.D0.B2.D0.BA.D0.B8_.D0.BF.D1.80.D0.B8_.D0.BE.D1.82.D0.BA.D0.B0.D1.82.D0.B5_.D0.B8.D0.B7.D0.BC.D0.B5.D0.BD.D0.B5.D0.BD.D0.B8.D0.B9 | https://ru.wikipedia.org/w/index.php?title=Википедия:Форум/Архив/Технический/2014/09#Утеря_описания_правки_при_откате_изменений ]]