Thread:Project:Support desk/What makes wiki links go from red to blue/purple?

From: http://www.mediawiki.org/wiki/Help:Starting_a_new_page

Once the page has been created, the link will change from red to blue (purple for pages you've visited) indicating that the article now exists.

What (maintenance scripts?) makes the link go from red to blue/purple after the page has been created? I am noticing the links are not getting updated to blue/purple after the page is created. Are there any manual jobs I can run to make this happen?