Maybe it's related but mine was an "badtoken: Invalid token".

s$$([},&%#}/&/]+}%&{})*;#$&&s&&$^X.($'^"%]=\&(|?*{%
+.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e

In reply to Re^2: MediaWiki::API badtoken every now and then by Skeeve
in thread MediaWiki::API badtoken every now and then by Skeeve

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