Last modified: 2010-05-15 15:41:08 UTC
I've reported this bug to the author of the Bad Behavior extension and he's indicated that it only appears in 1.7.1 to his knowledge, and seems to be related to the hook which calls Bad Behavior being called multiple times during the generation of certain pages. The symptoms are excessive whitespace in certain pages, particluarly Special:Recentchanges and the edit page. This is caused by spurious insertion of <p> tags into the code. Associated with insertions of whitespace or <p> tags is a Bad Behavior runtime comment, indicating that the extension is being run multiple times for certain page renders. The comments are not always associated with insertion of HTML elements which mess up the page, however. Bad Behavior comments appear at other places in the source without associated whitespace. This behavior has been noted on two MediaWiki installations running 1.7.1 and Bad Behavior 2.0.5 and 2.0.6. They can be found at http://www.umasswiki.com/ and http://bbswiki.evernex.com/ . The author insists that the bug must be in MediaWiki so I am reporting it here.
Sounds like a bug in the extension, which we don't have and didn't write. It's probably making incorrect assumptions, and making incorrect output.
Even though this bug is (currently) closed, I'd like to point out that the function in Bad Behavior 2 which outputs the timing comments associated with the spurious whitespace is called by hooking to ParserAfterTidy. So my uneducated guess is that there might be a problem with ParserAfterTidy. see $wgHooks['ParserAfterTidy'][] = 'bb2_mediawiki_timer'; and function bb2_mediawiki_timer(&$parser, &$text) { global $bb2_timer_total; $text = "<!-- Bad Behavior " . BB2_VERSION . " run time: " . number_format(1000 * $bb2_timer_total, 3) . " ms -->\n" . $text; } It doesn't explain the apparent insertion of <p> tags, but this HTML comment is being added multiple times within the rendered source of the page.
Pardon my shotgun approach here, but see also http://mail.wikipedia.org/pipermail/mediawiki-l/2006-February/010022.html and Bug 1772.
