Last modified: 2012-08-22 14:30:53 UTC
When I click on "add", in any page, a new blue line appears, with the text "null" instead of the textbox. If I repeatedly click "add" I get further lines, all with the text "null". Before I got this error I've been able to add a few data, though.
Is this on http://wikidata-test-repo.wikimedia.de/ or another installation? I can't reproduce it on http://wikidata-test-repo.wikimedia.de/ with Chromium right now. Can you link to a specific article where it is happening for you?
It's there. Anyway, it only happens on this computer. I've tried on other machines and it works fine.
Please reopen the bug with more details if it occurs again. Seems fixed by latest patch.