Board Thread:Support Requests - Getting Technical/@comment-35301431-20130419093109/@comment-3528606-20130420222119

will only work for slight changes.

"The value must be equivalent to the default title: only capitalization changes and replacing spaces with underscores are allowed (this can be changed with $wgRestrictDisplayTitle). It can be disabled or enabled by $wgAllowDisplayTitle; disabled by default before 1.10+, enabled by default thereafter."