Heya folks,
We've just installed all the extensions on the demo system that are in use on enwp to notice problems early with any of them. However the other Wikipedias of course have other extensions installed that might also be relevant. Please let me know if you know of any extensions that we really should include in our testing and that are not yet installed.
http://wikidata-test-client.wikimedia.de/wiki/Special:Version
Cheers Lydia