At least on alsWP, deWNews and deWikt the message MediaWiki:Sidebar regularly falls back to an totally obsolete version, due to some kind of server cache problem. Then many links are obsolete or broken on the left navigation sidebar, because of many changes towards the sidebar after the un-customisable version of [[MediaWiki:Sidebar]] had been enhanced to what we know now.
For forcing the servers to fetch the newest version, you have to edit and save [[MediaWiki:Sidebar]] as a sysop, unfortunately (for those who are reading: You do not have to change the page, just click "save" without having changed something; that's enough).
Is there a way, that [[MediaWiki:Sidebar]] does not get affected by this server cache effect? This fall back is pretty annoying, I would say! --- Best regards,