[Toadling]

It sound like you're talking about the view bar filters, which aren't actually headers (i.e. column headings). They don't line up with any particular columns, if that's what you mean.

When a filter value shows up in blue, it indicates a setting that has been temporarily altered from the current perspective's saved values. To return to the perspective's saved settings, click the little "x" button on the right end of the view bar.

This feature actually isn't new in 1.6; it was introduced in version 1.1 last year.

-Dennis