SharePoint User Information Userdisp.aspx Error

This is an issue that’s been around for a while so I’m just re-posting an answer I’ve found on several sites, including http://www.eggheadcafe.com/community/aspnet/69/10104052/receive-404-page-not-found-error-when-going-to-useraspx-page.aspx. I had to make this change on a farm recently so my post here includes a few more details that I didn’t see elsewhere. Issue: On a SharePoint 2007 site, when browsing…