First Seinfeld is yanked. Now it's come out that the new Microsoft branding commercial bragging about how "I'm a PC" was actually made on a Mac.

Adding more insult to injury, the "I'm a PC" commercial used an application from Adobe, another Microsoft competitor. "I'm a PC" has drawn a lot of speculation about whether Seinfeld was meant to have such a short run as Microsoft spokesperson, but "I'm a PC" ads being made on a Mac is not something Microsoft would want to play around with.

The ad agency responsible for the commercials--Crispin Porter + Bogusky--and Microsoft have since scrubbed clean any official versions that would tip off savvy users that Microsoft used a Mac to create "I'm a PC."