Hi,
As you might read on Wikitech-l, document.write is unsupported now in
community and personal javascripts.
Although at the end they decided not to make Wikipedia totally unreachable
for users with such codes, :-) it is still a problem.
I wrote a quick and ugly script to warn these users:
https://hu.wikipedia.org/wiki/Szerkeszt%C5%91:BinBot/documentwritewarning.py
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Bináris