For the past five years, Tiger Global has been a staunch supporter of Palo Alto-based Kleiner Perkins Caufield & Byers. In fact, when the venture capital firm’s co-founders John Doerr and Ken Wilson announced in January they were leaving for greener pastures at Amazon.com Inc., it was revealed that Kleiner had sold to Tiger Global a 19 percent stake in their company valued at $500 million. The same day word got out that Mike Foulkes–who helped found Oracle Corp.–would be joining KPCB as vice chairman after serving as CEO since September, the New York Times reported “in an exclusive story” that KPCB bought all of Bazaarvoice Inc.’s intellectual property from Kleiner for $30 million. Ten months later KPCB is reportedly trying to sell Bazaarvoice for between $700 million and $800 million, which could make it one of this year’s biggest tech IPOs with some analysts predicting it could fetch more than twice its original value of about $200 million. It also helps explain why Foulkes left Oracle–where he’d held numerous top engineering positions including chief technology officer–to join what is now called Internet Retail Group (IRG) as president on April 10th….