Hello-
I used to use Astia all the time until the 10D. Its great film, especially pushed a stop. I agree with everyone about the film being expired. In fact, the same exact color cast happened to me when shooting Astia. The film wasnt expired but I had left it in a hot car all day, like a fool. I was suprised to see the purple cast but really thats the only thing I can attribute it to. Hope this helps!
EOS 70-200L Astia +1 stop