The recently circulated screenshots of Snow Leopard build 10A435 are almost certainly fake.
This section of the Quicktime Preference menu looks copy/pasted to me:
Note the anomaly in the antialiasing in the drop shadow on the left edge. Here’s a zoom:
Looks fake to me. The “Preferences” item has been pasted in from another application, and the lower half portion of the original menu pasted below it, creating the mismatch – the background is darker above, where it was copied from. There is no other plausible explanation for that anomaly in the drop shadow.
Nice try!
Of course, this strongly implies that 10A432 is indeed the GM, for better or worse. It’s surprisingly rough around the edges, but hopefully they can polish it up a bit quickly.