Last modified: 2012-08-02 12:50:20 UTC
As reported at [https://www.mediawiki.org/wiki/Manual:$wgMaxSigChars?diff=568295] the setting introduced on r22960 (to fix bug 8458) do not consider the length of the substituted templates used in the signature, so although {{subst:<Very long template name>}} will be rejected if the template name has more than $wgMaxSigChars (-10) characters, {{subst:Main page}} will work even if the main page is a lot longer than $wgMaxSigChars. The validation should be fixed to consider the length of the expanded (subst'ed) signature.
*** This bug has been marked as a duplicate of bug 10715 ***