After putting the kibosh on the truly baffling Seinfeld/Gates TV ads, Microsoft is doing a new ad campaign where they “take back” the “I’m a PC…” slogan popularized by Apple’s Mac ads. But it turns out some of the images used in Microsoft’s new ads appear to have been made on a Mac.  The new ad campaign, intended to restore Vista’s poor reputation, is reportedly costing $300 million. Wouldn’t that money be better spent improving the product in some way?