Last modified: 2014-06-24 18:17:20 UTC
Per Brion's bug 9209 comment 4, making the sitenotice dismissable (and loaded via JavaScript) for unregistered users is one of the main requirements of this extension. I don't know exactly at what point this stopped working, I noticed only now. It was reported in 2012 at [[mw:Extension_talk:DismissableSiteNotice#How_can_anons_dismiss_a_notice.3F]].
I'm doing this right now, thanks to the TLV hackathon - by reintroducing $wgDismissableSiteNoticeForAnons. I don't like it, but I'm going to keep the current encodeJsCall behavior for anons, in order not to introduce any Google-snippet-related issues.
*** Bug 26875 has been marked as a duplicate of this bug. ***
Submitted Gerrit change #112951.
Change 112951 had a related patch set uploaded by Nemo bis: Allow anonymous users to dismiss the sitenotice https://gerrit.wikimedia.org/r/112951