I have a minor issue to report. Typically when you hover over an image in the tree for a period of time or press F1, you get a pop-up which gives you a thumbnail image and a label that lists the dimensions of the source image:
This works well with all typical images. Using an unusually large image (2048x2048), however, results in the following:
The image is scaled appropriately to fit the window, however the label is hidden below the rendering area of the screen. I know this isn't typical use, so I would put this one down on your lowest of low priorities. Thank you.