Exactly, I think this is the problem. I have a couple of links from the spanish list. Maybe you can take a look at them:
/usr/src/linux-2.4.21-166/Documentation/video4linux/bttv/Cards mentions your chip. http://bytesex.org/cx88
That means, I have to update the driver to this cx88 driver, doensn't it? I'll check it out if I have time.
And here is the newest sw by SuSe people. Maybe you could find anything here: ftp://ftp.gwdg.de/linux/suse/people/kraxel/9.0-i386/
Already updated, before wrote the problem to the list.
Thanks & Greetings