Thanks Asi, have you seen a similar thing in your 400D mate? Someone else sent me a private message with a pic from a 400d and the banding was present, altho not as bad as my 350D shows
Jim, no dark frame has been done, and it is from a maximum quality JPG - i had camera in jpg/RAW format when taking it, so I have both, as i mentioned its not as bad when using the CR2/RAW converted to 16 (12)bit tiff - but the banding stands out without doing any processing - which to me is unacceptable unfortunately - it gives me the heebee jeebies to be honest! wouldnt be too bad if i was photographing zebras at night

I have never taken an image longer than 30 sec with camera Jim, so cant answer that, sorry!
Sejanus, i had never noticed it before in either my Nikon CP 5700 or CP 4500 digicams

prior, altho they are VERY noisy, much much more noisier and primitive chips, but its just random like i would expect, they dont exhibit the same pattern/banding thing at all.
I will be getting a 400D just the same

10 MP is very attractive anyway.
and for such a common feature/problem?, i have never seen anyone talk about here!?
hmmm confused

is it the secret digital shame no one will talk about! hiding it from us film guys all these years
i am thinking it must vary from individual 350d camera to 350d camera, QC? - i had never noticed it in anyone else's images either - thats why i thought mine was an isolated case?