Not to your issue.. i m using v700. i noticed that if i batch scan more than 5 photos (1strip or so), going to next strip.. while using ektapress (kodak film), the color actually turns blue-ish for the rest of the photos other than the first 5 (as the color profile for that particular film is disabled for some reason after 5 photos).. i believe its more towards the problem of the software bug (which is silverfast se bundled with the scanner, in my case). i have no issues scanning other film (portra 400) all at one shot. You have issues scanning all different types of films? Maybe also try using other software such as vuescan as well to test it out.