Thread:Project:Support desk/No way of getting hold of extensions guaranteed to work with 1.20.0/reply (5)

They may well be tagged in Git but that doesn't help those who use ExtensionDistributor to get extensions (or only know how to pull the trunk version using Git).

I'd forgotten that ConfirmEdit actually comes bundled with MediaWiki these days. I can confirm that the version included with 1.20 is not compatible. If you set $wgCaptchaClass = 'FancyCaptcha' in your LocalSettings.php you will get an HTTP 500 error if you attempt any operation involving a captcha such as creating a new account. If you look in FancyCapthca.class.php you will see it includes a call to getWikiId. The FSFileBackend class does not have that method in 1.20, although the trunk version does. The Apache error_log confirms that the failure is due to an attempt by FancyCaptcha.class.php to call FSFileBackend::getWikiId.

As Bawolff says, embarassing.