apache 2.2 on debian "file does not exist" error

Hi,

I just upgraded from apache 2.0.5x on debian to the stable releases
apache 2.2. One issue that has arisen that I have not been able to fix
is the following error that I get quite regularly (almost as though it
gets generated a couple times whenever a browser first makes contact
with the server but then is not generated again during a keep-alive
session, but this is just speculation):

[Wed APR 25 10:56:17 2007] [error] [client 127.0.0.1] Files does not
exist: /htdocs

This error does not prevent any sites from working. Everything works
fine, but the error log keeps getting hundreds of these and hour.

"/var/www/htdocs" is a document root for one virtual host on the
server, but I can find no reference to "/htdocs" (as opposed to
numerous references to "/var/www/htdocs") in any config files, nor in
any web pages. I am at a loss for isolating the cause of this error.
Any ideas or suggestions?

Thanks