Last modified: 2013-05-13 11:29:36 UTC
There should be a proper dismiss action for the copyright notice. This could be either one of a window close (x-action), a box for "don't show thiss message again", or a preference in [[Special:Preference]] to not show this message again. It could also be several of them, or at least the user preference in addition to one of the other two. See also http://www.wikidata.org/wiki/Wikidata:Project_chat#.22I_accept_these_terms_for_my_future_edits._Do_not_show_this_message_again..22
This got solved quite some time ago in f027d06f96d410a5e4bcd786acd1af181b2fb0a7. The feature got broken in I010f7086fec45814c2715667f2d2056fdfd926b0 and fixed again in I8d2517568b394f9da8e2ad753e5c8d9fe9595a45.