Unable to access one website - wgr614v10

I have a WGR614v10 unit with the latest firmware available that will not access one particular website. When I switch out the unit for a Linksys WRT54g unit using the same internet service, I can access the site fine. I tried the Netgear unit at a different location and got the same result, so I have determined that it's the router. No sites are being blocked in the configuration. Even though it had the latest firmware, I reflashed it to rule that out. I have read other posts and tried switching the MTU, but that did not help. Also tried turning off the DOS attack preventer setting, no change. I have also set the router back to factory which did not help either. Any help would be appreciated. I am stumped on this one.