They back these claims with errata date from Intel which shows they have already found 34 problems with these chips.
As you can see, only one errata item is even planned to be fixed. It's worth noting that leaving known errors in processors is nothing new, as many of Pentium 4's 65 known errata (download the PDF) have no plans for correction either.You can read on over here.
Still, the Core Duo and Core Solo processors are just out of the gates, and this high number of immediate errata should leave one a little chilled, I'd say. Releasing a brand new processor with 34 known errors seems almost criminal to me, especially with some of the more obnoxious ones highlighted above.