If you are using the Advanced datagrid, you need to use horizontalAlign or verticalAlign. so in CSS you would say horizontalAlign:left.
textAlign does not work for the Advanced Datagrid. See http://bugs.adobe.com/jira/browse/FLEXDMV-1633 Flex bug 1663 - -- View this message in context: http://www.nabble.com/DataGrid-Header-Center-Align---tp9100312p16826469.html Sent from the FlexCoders mailing list archive at Nabble.com.