Last modified: 2011-04-14 15:12:46 UTC
Titles containing consecutive single quotes are impossible to link to in the current implementation of the parser. As such, they should be disallowed (or the parser tweaked). Test case: [[testwiki:User:MER-C/Sandbox]], linking to [[testwiki:''test]]. See also: [[WP:RAF#Disallow creating articles with multiple single quotes]].
We almost disabled this a couple years ago, however Neapolitan uses the '' sequence legitimately within text, and it appears in article titles. :( See bug 8097, bug 8932... and probably a couple related entries I can't find atm.