example:
http://www.mongodb.org/display/DOCS/getLastError

I find it annoying that a page which appears to have a lot of content redirects me. If there is a 3 second redirect the page should say, "this page has been moved, redirecting you in 3 seconds". It shouldn't have all the old documentation visible.

I think either of these 3 options would be better.
0. Remove everything on redirect page except for simple message explaining redirection.
1. Use HTTP 301.
2. Use HTML meta redirect with 0 timeout.