If drag-and-drop an image onto the PM ikon (in Windows), PM should position the "contact sheet" to that image and select that image. In addition, it should show the image on the preview screen. At present, the "contact sheet" directory is opened but no other action is performed.
The would add flexibility when opening PM (possibly after viewing thumbnails from the operating system) and, as a side benifit for Windows, PM could be used called by other programmes to display and position to a specific image. For example, a catalogue programme could point to a specific image of "Betty in blue in Monaco" and have PM open the target directory correctly positions to the exact image.