I noticed that the Quicktime logo has been appearing in my client a lot as a texture is beginning to res. It happens when I upload a texture and appears just before the preview texture rezzes. It also happens in the blue notification box popups and stays a second just before the SL hand appears. The strangest thing is to open the map up and see a map full of Quicktime logos that dissapear one by one as the map parts rez in.
Included a picture of the map because that was the easiest to capture.