Fatal error when I try "Log in / create account"
Fragment of a discussion from Extension talk:ConfirmEdit
Try the latest version of ConfirmEdit
I use trunk version from SVN (last update at 2011-12-17).
You need to use the REL1_18 branch for both your main MW install and this extension. You can fix this by going to your ConfirmEdit directory and running:
svn switch http://svn.wikimedia.org/svnroot/mediawiki/branches/REL1_18/extensions/ConfirmEdit
Apparently, the change with getIP() hasn't been propagated to the REL1_18 branch.
Problem appears since r106097.