OT: anything in CentOS 5.2 that uses opendns.com when browsing web?

["Lanny Marcus" <lmmailinglists@xxxxxxxxx>]

I believe this is completely OT, but I want to be positive. I have a fully up to date CentOS 5.2 box. During the past week, when surfing with Firefox (and today, while testing with Konqueror), frequently, especially when DNS is slow,  I am seeing references to opendns.com  At times, I end up on opendns.com web pages, instead of at the web site I'm trying to get to.  My ISP, the phone company, claims this is not coming from their end and that they are not using opendns.com. I was told they have two (2) DNS servers. I haven't changed anything in my IPCop Firewall/Router box and my belief is that this is coming from my ISP or upstream from there. . If using opendns.com  is something new in CentOS 5.2, please let me know. TIA.
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