EOS 10D Flash metering

[andycarnall]

I'm wondering if anyone else has this problem or knows what to do about it. I have an EOS10D and a CANON speedlite 380EX (E-TTL metering).

I have noticed that while flash pictures look fine at low ISO (digitallly set to 100 or 200) at higher ISO (especially apparent at 1600) picture are over exposed.

I can overcome it by manually setting FE compensation, but I would have expected that the flash exposure should take account of the ISO rating of the film.

Any ideas?