Wed, 27 Jan 2010 09:59:13 +0100 Sylvain Thénault by default this is not the widget responsability to turn empty string into None,
Wed, 27 Jan 2010 09:57:53 +0100 Sylvain Thénault ensure we get a correct key
Wed, 27 Jan 2010 09:57:16 +0100 Sylvain Thénault test fixes
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