Apple senior vice president of services Eddy Cue set alarm bells ringing on Wednesday after dropping a bombshell at Google's antitrust trial: Google searches through Safari dropped in April for the first time ever. While his comments triggered a frenzied sell-off in Google stock, it might not be the only reason the company's watchers should be concerned about Google's ability to keep full control over the search market.A little-noticed number in Google's latest financial disclosure may be the realest sign ...