There are three configuration variables that govern how WikiNames appear in page titles, page headers, and page text.
Splitting or separating of wiki names means that 'Tavi displays the names with the words separated by spaces. In other words, RecentChanges would appear as Recent Changes. You can have 'Tavi do this automatically for you.
In version 0.21, $SeparateTitleWords is the only one that is enabled by default. The reason it is not enabled in page headers and page text is that it can be potentially confusing. . . If a page appears as ((RecentChanges|Recent Changes)), how do you know whether to type "RecentChanges" or "((Recent Changes))" to link to it?
But site admins are welcome to override these values in config.php if they wish.