Restore the test for lax tab parsing in Safari <= 5.1.2 and FF 3.1b1.
Restore the test for lax tab parsing in Safari <= 5.1.2 and FF 3.1b1.

yetone/json3,jcoc611/cassandraMAP,yetone/json3,jcoc611/cassandraMAP,bestiejs/json3,oyvindkinsey/json3,tildeio/kamino.js,bestiejs/json3,cyril-sf/kamino.js,mcanthony/json3,mcanthony/json3