Looks like Yahoo could do with having a revolving door or two installed in its boardroom. Fred Amoroso, the firm’s Chairman of the Board of Directors, has just become the latest high profile exit at the transitioning internet giant, resigning his position and saying that he has no intention of seeking re-election to its board. Almost immediately after he fled, Yahoo moved to announced Maynard Webb Jr. as the man to step into his shoes, at least on a temporary basis.

For those who haven’t been keeping up with the comings and goings at Yahoo, Amorso had only been in the company’s hot seat for around 12 months, having been appointed at around the same time as Ross Levinsohn was chosen as CEO to replace Scott Thompson, who resigned his position after being caught lying on his resume.

As is normal in these circumstances, Yahoo politely acknowledged the personnel changes with current CEO Marissa Mayer making the following statement:

“Fred has been a wonderful chairman for Yahoo over the past year, and I’m personally grateful for his trust and guidance as I took on the role as Yahoo CEO. Fred’s mentorship and perspective has proved truly valuable to me in my first few months here at Yahoo.”

Amoroso came up with an equally bland statement, professing how much he enjoyed his time at Yahoo:

“I’m very grateful and proud of the progress Yahoo has made over the past year. When I took the position as chairman, I told the board that my intention was to serve for one year, in order to help Yahoo during a critical time of transformation. In that time, Yahoo hired a great new CEO, brought on a fantastic management team, revitalized the employee base, and has begun to release top notch new products. With Marissa at the helm and the leadership team in place, this is a natural time for me to transition off the board, consistent with what I said a year ago.”

Neither of these statements give us any real clues as to why Amoroso left so soon after his appointment, but an article this morning in BusinessInsider came up with a few theories that would suggest the departed Chairman just didn’t fit in after Mayer’s own arrival on the scene.

Apparently, the clock started ticking on Amoroso’s tenure just after Levinshon’s appointment as interim CEO in place of the disgraced Thompson. BusinessInsider claims Amoroso declared that Levinshon was his first choice to become permanent CEO of the company, only for other directors to go behind his back and appoint Mayer instead. While there’s no suggestion that Mayer and Amoroso’s relations were anything but amicable, it’s clear that such a move would have done little for the chairman’s credibility within the organization.

There are other reasons too. Lest we forget, Amoroso was first appointed by Roy Bostock, who has been blamed by many within the company for getting it into the mess it’s in now. Moreover, given Amoroso’s connections to the known patent troll Rovi, it’s believed that he was one of the main architects of the Yahoo’s disastrous lawsuit against Facebook last year, which left the firm reeling in embarrassment.

While none of these rumors can be substantiated, the old saying“there’s no smoke without fire” often holds true. It wouldn’t be a huge surprise if there were more than a few grains of truth to them, and if so, it’s clear that the writing has been on the wall for Amoroso for some time now.