Andy_Langton - 10:40 am on Oct 24, 2012 (gmt 0)
The 404 isn't really the problem - the problem is the links to these pages.
Find out which pages link to the 404s and then you can figure out how to fix the problem. If they're your own links, then you should correct them. If they're external links, and particularly if they link to content that has moved, you should redirect. But the links are they key - not the 404.