Lightning 2.4a1 missing Check boxes for Calendars

I noticed my calendar check boxes missing in the calendar tab after the 
update to Thunderbird Daily on 08-03-2013 with the new grain background 
for the Folder pane.

<https://bugzilla.mozilla.org/show_bug.cgi?id=845819>

Still the same after yesterday's updates to Thunderbird and Lightning.

Can't restart with add-ons disabled since Lightning is the only extension.

Is there any relation?

Mozilla/5.0 (X11; Linux x86_64; rv:22.0) Gecko/20100101 
Thunderbird/22.0a1 BuildID: 20130309030516

-- 
Fedora 18.0 (64-bit) KDE 4.9.5
Thunderbird Daily
If we burn in hell, do we freeze in heaven?