apache error logs - file does not exist

System

Does anyone else have messages like these in their apache error logs? There are so many in ours that the logs are almost useless in a text editor (I know I can write a script to parse them, but I am wondering if there is something I or Interwoven should fix).

File does not exist: c:/iw-home/httpd/iw/ewebeditpro20/btnhr.gif

File does not exist: c:/iw-home/httpd/iw/launchpad100/symantec/