However, I'm glad I finally figured out how I can grab one frame from a movie in QuickTime Player X. but there were also a ton of features removed (like being able to set advanced export options, save a movie as images, and do some other more advanced edits/exports. There are many things to like about QuickTime X, and many improvements were included over QuickTime Pro 7.
In recent versions, to grab a frame, do the following: Update: More recent versions of QuickTime Player have the ability to copy frames of the video by using 'Command + C'.