tedster - 2:36 pm on May 5, 2010 (gmt 0)
I watch webmaster tools for a good number of sites and I'm not running into this. It can't hurt to use one of the online DNS checkers just to see what gets reported by a third party. While we don't discuss specific tools here, I will say that I prefer the thoroughness I get from one of the paid services. However, many of the free services can certain spot a gross problem.