I'm also chasing this problem on a Toshiba 901 ( SAME AS THE RICOH MP ). I haven't narrowed it down yet, but i have 2 of these side by side. went there today..dog earing like crazy.. Swapped the entire fuser unit and the entire exit/belt section. Dog ears stopped immediately..for about 1 thousand copies..then here they came again...25 good ones...2 or 3 dog eared 200 good ones..3 dog ears, etc...I left after a couple hours of frustration..This copier also has a brand new duplex unit with less than 20K copies... Now that I've eleminated these 3 sections, I think I'm gonna pull out the registration unit (pain) and study it. It's gota be in the copier itself because on side 2, the image is very slightly skewed,less than 1mm. I've got 20+ years in the industry and this machine is making me feel like a full rookie...I've nurtured it thru 14 million copies...
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