I don’t know what these might have been, could be ice, could be just tricks of light. I do know that one of the images I captured this morning of the main tank separation had a bright white piece of something zipping away from both the tank and the orbiter. You can see it in the photo that there is a tiny white speck above the tank strut on the right hand side of the image. (Click on the photo for a larger image) I doubt that it is anything to be worried about but the boys at NASA are going to conduct some imaging runs on the tiles in the next day or so
Video showed what appeared to be a large piece of debris flying off the external fuel tank two minutes into the flight. The object did not seem to hit the orbiter. Footage also showed what might have been at least two light-colored objects flying off Discovery as the shuttle cleared the launch pad.
Shuttle Discovery Blasts Into Orbit