On MediaWiki 1.9.3 we are getting "bad title" errors if almost any punctuation mark is included in the title.
Examples include the single quote ' and ordinary brackets ( and ) - i.e., "normal" special characters, not weird stuff like # and & and + (which is in any case not required in our case).
Copying $wgLegalTitleChars from DefaultSettings.php to LocalSettings.php makes no difference; not have any of the variations on this I have tried.
I have run out of ideas to try, can anyone suggest a fix - it's driving my users nuts.
Thankyou in advance