Sorry, it was the "Related changes" feature and not the History link (wrong translation on my part).

It was a wrong variable name. I renamed the variable from $skin to $sk and I don't get an error anymore.

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From: Webmaster Comunitatea Română [mailto:webmaster@comunitatea-romana.com] Sent: Tuesday, August 01, 2006 12:58 AM To: 'MediaWiki announcements and site admin list' Subject: Undefined variable: skin in .../includes/ChangesList.php on line 52.

I upgraded from MediaWiki 1.6.3 to 1.7.1. Everything went fine overall, I didn't see any error and I can see the articles.

When I try to see the history for an article, that's when I get this error Undefined variable: skin in .../includes/ChangesList.php on line 52

Any ideas what's wrong? Thanks, Adrian