Doug, I started my professional career in the Printing Industry and I was Supervior of Composition which included the proof readers. Everyone got used to picking up materials in the plant and giving them one last look before they were shipped and we still had errors. We were doing a relatively expensive desk calendar once and I was walking throuigh the Bindery and picked one up to check. It had 31 days in November! They were about half way through the binding operations so we caught most of it but had to disassemble the finished calendars and slip in a new November (with the standard 30 days).
I see typos every day in the newspaper, in brochures, magazines, on line, etc. but it has to be particularly embarrassing when it occurs in your logo.