We hear that Mark Rubash, left, a Yahoo finance executive hired by Yahoo president Sue Decker in February, is already leaving the company. Rubash, a favorite of Decker, was apparently the loser in a turf war with fellow finance executive Rachel Glaser, pictured here to his right.. We can't help but wonder if Glaser, a commuter from Los Angeles who's widely disliked on the Sunnyvale campus, will last much longer, as Yahoo undergoes a top-to-bottom reorganization. "She has no financial acumen," whispers one tipster — a fact that, if true, can't be lost on Decker and her recently hired ally, CFO Blake Jorgensen. Update: Rubash says he was offered a job over Glaser's head, but turned it down.

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