I just set up an YSM account. It's live, but I keep getting 404 errors from one specific page, one that is there. More than one person has verified it.

There are no links going to this page.

We code all ads and words to have an identifier at the end. So the URL looks something like this:
http://www.example.com/content/page1.htm?source=skis

I opened my logs to investigate the 404 errors. The weird thing was that the URLs had spaces in them. So in my logs they looked like this:
http://www.example.com/content/page1.htm%20?source=skis

I immediately went to my account to look at the specific word (the code tells me that). The ad was fine. No spaces in the URL.

So I tested the ad itself by searching the word. Performed perfectly.

Next thought, these are probably bad bots/bad people. I started asking what each IP was. Some of them were bad (African RIPE network) but some of them were good (a prospect that filled out a form).

Help! I want to make sure people are getting to my page and I'm not serving up a bad page.