What's the difference between text and header when specifying columns?

[tonyx]

In GridPanels, specifying column header as either 'header' or 'text' seems to achieve exactly the same thing. Are there any differences between them?

[skirtle]

Judging by the code there's no difference. See the first few lines of initComponent:

http://docs.sencha.com/ext-js/4-0/source/Column.html#Ext-grid-column-Column-property-isHeader