Currently i am not able to use Dates as expected inside IE8!

My Workaround is to use overwritten dateReadFormat, but normally (and in previous releases)
'Y-m-d' should be detected be default!

Ext.define('Uo.ed4s.data.Field', {
override: 'Ext.data.Field',
dateReadFormat: 'Y-m-d'
});

Cheers Holger