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Yahoo sources told BoomTown's Kara Swisher that there's a price to be paid for management's lofty promises to shareholders. Top executives are considering "cutting costs" in Yahoo's mobile operations and the Santa Monica-based Yahoo Media Group. A Yahoo executive tells us that he doesn't buy the layoff rumors, and he's "not overly worried." So who are Swisher's sources and why are they spreading so much doom and gloom? That's just life at Yahoo, our source said:

The Microsoft stuff created a certain amount of anxiety. We're in a tight ad market and people are nervous in general and they're kind of assuming — speculating — that there's going to be some big change in strategy. As far as I know — and as far as I believe — there's nothing imminent. I think it's a matter of people getting too spun up, getting worried and leaking — it happens all the time at Yahoo.