Apache2 Virtual Host Cache Issue

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http://serverfault.com – My company has an apache2 server running on RedHat Linux. We have a ton of name based virtual hosts for many domains. Recently our Hosting Provider went down and lost our data. We managed to restore an older backup but we had to change the Document Root in order to make this happen. Now that we updated the DocumentRoot to the new directory, everything seems to work just fine. However, some of our customers still complain that when they enter certain webaddresses that it redirects to our homepage. This is not a 301 redirect, in fact I have no way of knowing what it is. We tell the custom (HowTos)