It is now possible to load an image into the background, and align it precisely with a placement list, and / or a gerber image. It is then very easy to navigate around the board, and check for any non-alignments of data.
There are a number of other performance and functionality improvements.
For a limited period, 3 month licenses for GerberGrab are free.
Please see http://www.gerbergrab.co.uk for more information.