Mac OS X 10.4.11 with Canon printer issue

[wondergirl]

I have a weird problem. We have a new Canon IR C3480 printer and I use mostly Illustrator CS3. When I have text or an object with an outline the same colour as the fill there is a darker-coloured line between the fill and outline when printed. It is not an Illustrator issue, because a pdf printed from Acrobat Reader does the same, also Freehand. This thin line is NOT visible on screen. My Canon techs cannot solve this issue, think maybe my OS needs to be updated (of course!). Has anyone ever heard of such a thing???

[MisterMe]

It is not nice to double-post.

[wondergirl]

This is my first post, please excuse me. I'm desperate.