Cards named with a number inaccessible by name+example

Created "2012" on test and it exists according to http://test.dwagn.org/recent (Nov 28, 2011) but http://test.dwagn.org/wagn/2012 and http://test.dwagn.org/card/edit/2012  show http://test.dwagn.org/wagn/size_test_for_different_views+image - which is card id 2012, see http://test.dwagn.org/card/view/2012

Found the card id, it's accessible via http://test.dwagn.org/card/view/3052

Plus cards work fine, see http://test.dwagn.org/wagn/2012+test