Some shooters have asked why the S2's blooming control seems to function better when the camera is tethered to a computer than when it is used with the BatPac™. The fact is that the blooming control is the same in both cases. It may be apparently worse with the Batpac™, because with the Batpac, you are outside, the lighting is uncontrolled, and very bright things on a sunny day are hard to miss.

It is important to note that the blooming control works better if the exposing light persists longer. Thus, a long exposure with a smaller aperture in ambient light works better than a short exposure with a larger aperture to control blooming. With strobe, the blooming contol happens during the time the light is falling on the chip...not during the whole time the shutter is open.
So the blooming control works better with a strobe duration that is longer.

The S3 blooming control is built into the silicon of the CCD device, and is an order of magnitude better than the blooming control of the S2.