well its like a usual output of point and shoot cameras, like what i
have for outdoors, if i zoom it up to the digital limit after the
optical, i get blurry images, not just by over exposure but also loose
focus. mine even has image stabilizer but i sometimes get the same
result specially if i dont wait for the auto-focus to trigger the
stabilizer.
mines a canon a460
have you tried combining manual and automatic focus settings to diff ISO's?