I think an rc2 is a good idea. The "Known Issues" section of the RELEASE-NOTES-1.20 has shrunk and I've used Platonides comments to update that section so that people can see whether or not they are affected. In any case here is what it looks like (with some editing of my own for this email:
* (bug 35894): Reports of secret key generation "hanging" on windows This is probably a bug that has been fixed in PHP. If you run into this, try upgrading your PHP. * (bug 38334): Undefined index: href in Vector.php on line 416 We think this is a problem in some extension. If you see this, try disabling your extensions and check out the logging patch on this bug. Or try this patch: https://gerrit.wikimedia.org/r/#/c/27937/1/skins/Vector.php * (bug 39268): [Regression] Toolbar inserts in main textarea only This should only be an issue if you are using the ProofreadPage extension. * (bug 40641): Clicking "others" in Special:Version downloads a file If you encounter this, you can tell your webserver to serve the CREDITS file with text/plain MIME type to fix it.
Full release notes: http://mah.everybody.org/mediawiki/1.20/RELEASE-NOTES-1.20.txt
********************************************************************** Download: http://mah.everybody.org/mediawiki/1.20/mediawiki-1.20.0rc2.tar.gz
Patch to previous version (1.20.0rc1), without interface text: http://mah.everybody.org/mediawiki/1.20/mediawiki-1.20.0rc2.patch.gz Interface text changes: http://mah.everybody.org/mediawiki/1.20/mediawiki-i18n-1.20.0rc2.patch.gz
GPG signatures: http://mah.everybody.org/mediawiki/1.20/mediawiki-1.20.0rc2.tar.gz.sig http://mah.everybody.org/mediawiki/1.20/mediawiki-1.20.0rc2.patch.gz.sig http://mah.everybody.org/mediawiki/1.20/mediawiki-i18n-1.20.0rc2.patch.gz.si...
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