What does this error mean?

[denisl]

Checking my error logs (admittedly for the first time on a 5yr old site) it is virtually full of items like this:

File does not exist: /home/****/public_html/directory name/null, referer: [mysite.com...] directory name/filename
[Mon Jun 03 22:21:13 2013] [error].

A link goes from the name referer to the index page in that directory. Using a link checker show no problems.

What does this mean - where does that null come from

[lucy24]

You need to cross-check against your access logs. But even the error logs should tell you who got the error. That's, uh, their IP, not their name ;)

In the obfuscated part of your post, does "/same" mean the literal text "/same" or do you mean that the request came with an auto-referer (currently popular robot trick)?