A crack in Apple – Google Relationship

Google is recently making some challenges against Apple a proper example can be Google with Android OS challenging iPhone.Recently Google CEO Eric Schmidt stepped out from Apple’s board of directors group.
Google has been the default browser in all the Apple products and to be more specific even in the current version of iPhone when you type something and click on enter you could see a “Google” button instead of “search” button to search for the contents.But now its not the case.In the recent version of iPhone with OS 4 Google button is replaced with the normal search button.This can be referred by the picture shown below.

With all the above small things happening between Google and Apple a doubt gets raised whether there could be a break in their relationship or it would be resolved in future.