>>>We have just moved to a new dual processor Windows 2000 webserver. Ocassionally the users get a "page not found" error when accessing pages. There doesn't seem to be any pattern to this. Sometimes hitting the browser refresh button will make it go away, othertimes not. Not sure if this is a .NET problems, or IIS or Windows 2000.
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>>>The pages were copied over form our older server, on that server we got no "page not found" errors.
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>>The problem still continues. Has anyone had this problem?
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>It could be a caching problem, or perhaps DNS. Did you change machine IPs? I have occasionally run into this problem on development machines, that are running the web server, database, and the web browser all on the same machine. And aspnet_wp.exe sometimes consumes too much memory, and the web server can server the page. But, I haven't run into it on the production machine, because we don't run all the database, web server etc on the same machine.

I think I may have found the cause of the problem. In the .NET framework 1.0 I had to occasionally manually clear the temporary internet files folder because new files wouldn't be recognized. Moving to .NET 1.1 and not uploading files while there are people using the app seems to have solved the problem. I am still crossing my fingers.