Here’s the latest Yahoo rumor that we’re chasing: The Yahoo board of directors met earlier today and authorized chairman Roy Bostock, not CEO Jerry Yang, to call Ballmer about re-starting negotiations. In fact, this rumor may have been behind the small rally in Yahoo’s stock today, which closed up 5.5 percent to $25.72 (still down from where it closed on Friday at $28.67). If this is true, it makes you wonder who is really in charge at Yahoo. Yang has been getting a lot of grief from angry shareholders for not taking Microsoft’s $33 a share offer, and instead holding out for $37 or $38. Now his story keeps changing on when he learned about the $33 bid. But when ...