Get popup images to open maximized?

[ganton]

Recently installed osCMax w/UltraPics v.1.0.0, and am using the CSS-fluid-1 template. Entered a test product with the maximum number of additional images. Large images are set to a width limit of 400 px in the admin, so sometimes the height will be around 600+ px. When I click on the main image or one of the additional images, the popup window is sized almost correctly for the image, but a bit of the image's bottom is cut off unless I click the maximize button in the upper right corner of the popup. I would prefer the popup window to open as maximized by default, or at least fit the image more precisely. I don't mind having a good bit of extra white space around the image for the large window, if necessary. Is there a way to make this happen?