It's sort of strange that this hasn't been reported before, but then I wouldn't be too surprised if no one is trying to save to a network path -- or is using a drive letter mapping to do so.
I may have to send you a debug version if you're willing to test, to see if we can't identify where exactly in the program things might be going wrong..
But it would be nice to first get some confirmation that this error/problem is something that happens for any attempt to use a network path, and not just something about your setup that is causing the problem.
I expect that it's some part of my code that is assuming a path should be to a real drive letter, or else some function call checking for the existence of a file, etc. BUT I believe that the program should be able to handle network paths for the screenshot directory if i can identify the culprit code causing it to choke.
Anyone else tried to use a network path as their screenshot directory?