Does anyone know of a site or RSS feed or email list that keeps collectors up-to-date on modern Canadian errors. I work at a post office and I look with every new release to see if there is an error but I know for certain that I miss things.
This'll get you a little closer. He covers just about every kind of variety you can think of on Canadian stamps. Most are tagging and die cut varieties.
I have never seen any website that keeps collectors up-to-date on modern Canadian errors other than what is published on the adminware.ca website.
The last catalogue I have seen that lists Canadian EFO's is titled "Canadian Philatelic E.F.O.'s: Errors, Freaks and Oddities (Issued by Darnell in 2005, Spiral bound, 226 pages). Darnell does not use the Scott numbering system. They have their own system of numbering stamps.
The Unitrade Specialized Catalogue of Canadian Stamps does list some of the errors (both tagging errors and printing errors). Unitrade does use the Scott numbering system. Their last publication was late fall 2009.