Last modified: 2013-10-09 17:23:45 UTC
Reported on the HTTPS talk page erroneously: https://meta.wikimedia.org/wiki/Talk:HTTPS#Unable_to_edit_Wikidata
he/she also reported this at https://www.wikidata.org/wiki/Wikidata_talk:Community_portal#Why_can_data_pages_not_be_edited_today.3F I replied there to get more info
http://www.wikidata.org/wiki/Q40734 is the page in question
Closing as judging from the talk page this is fixed now and I don't see anything else we could do.