Forum:Upgrading MediaWiki can lead to problems?

If the staff or developers upgrading Wikia's MediaWiki to the latest version "1.20", is there a problem over other Wikia wikis? This MediaWiki version annoying me. --112.210.108.70 06:03, May 1, 2012 (UTC)
 * Staff are, IIRC, planning an upgrade - but it does take a long time to sort out, because everything needs to be tested with the new version to check if it still works --  Random Time  06:12, May 1, 2012 (UTC)