Strange apache bug

One step behind

[zoltan]

I noticed on a client website something really strange.
Basically, apache is one page behind on perl / cgi generated pages.
So, if I request:
www.site.com/script.cgi?querystring1 I see a totally unrelated content.
If I request imediatelly after this:
www.site.com/script.cgi?querystring2 I see www.site.com/script.cgi?querystring1!
Then, if I access:
www.site.com/script.cgi?querystring3 I see www.site.com/script.cgi?querystring2!

OK, now, if I wait a few minutes and access www.site.com/script.cgi?querystring4 I see again some other page. Probably the same page that was previously requested by another user! Then, if I continue to randomly click on links... most of the time I see pages requested earlier by me or other users.

So, apache seems to be one step behind. What can be the problem here?

If I restart webserver, the problem disappears but after a while it starts again.