Updated A Register reader is claiming that Pentium II/mobiles using the Dixon cores embed unique serial numbers and has posted information on his site to back up his claim. And now Intel has confirmed it has a manufacturing problem. Pierre Chassaing's Web site produces evidence for his claim. He used a utility called WCPUID to interrogate a Dell Inspiron 7000 laptop. An Intel representative confirmed there was a problem. He said: "There is an erratum in a limited number of the mobile processors. Some prototype circuitry has gone through. We'll do a BIOS patch in the next day. This was not intentional." He added: "This erratum only affects those mobile Celeron and Pentium II Processor parts with on-die L2 cache that use the mobile module package. These products were introduced on Jan 25th of this year, and have only been sold in systems since then." Intel describes bugs as errata, not bugs. ® Intel moves to re-assure industry on erratanotbugs Intel Developer Forum Feb 99