Screen Snapshot can get confused between the main OS (Mavericks) and the OS within Parallels.
I usually solve that problem by going into the Finder in the main OS with the Parallels window still showing and then do a screenshot.
Also Command-Shift-4, which will allow you to open a sized box for a screenshot should also work.
I usually solve that problem by going into the Finder in the main OS with the Parallels window still showing and then do a screenshot.
Also Command-Shift-4, which will allow you to open a sized box for a screenshot should also work.