This is lovely — a Wikipedia page detailing errors in the Encyclopædia Britannica that have been corrected in Wikipedia.
This page catalogs some mistakes and omissions in Encyclopædia Britannica (EB) and shows how they have been corrected in Wikipedia. Some errors have already been corrected in Britannica’s online version.
These examples can serve as useful reminders of the fact that no encyclopedia can ever expect to be perfectly error-free (which is sometimes forgotten when Wikipedia is compared to traditional encyclopedias), and as an illustration of the advantages of an editorial process where anybody can correct an error at any time. However, this page is not intended to be a comparison of the overall quality of both encyclopedias, nor as a dismissal of concerns about the reliability of Wikipedia.
Thanks to my colleague Andrew Cupples for the link.