DavidGilbert99 writes "Marissa Mayer has been in charge at Yahoo for one year now. In that time she has seen the share price rise 70% and she's made some headline grabbing acquisitions — notably Tumblr for over $1 billion last month. However, look beneath the surface and things are not going so well. In this week's quarterly results, we saw ad sales fell by 12% year-on-year and as Alistair Charlton says in IBTimes UK: ' Yahoo earned $846m in cash by redeeming its shares in the group, representing a significant chunk of Yahoo's $1.07bn revenue for the quarter, down 1% on last year. ... The next few years will be a balancing act as the stabilizing wheels are removed and Yahoo, with dozens of acquired startups patching up the rust, will have to make progress under its own steam.'"