We had a few issues this morning so we had to make a compromise on our upgrade package and that made the difference of being in the top 10.

BBC: Ross Brawn despondent as Mercedes slump in Valencia

McLaren, who plan to unveil a massive upgrade package next month, are already perceived to be nosing ahead of rivals Ferrari, who still have work to do on the new F60.

BBC: F1 teams face testing times

And Button, seeing the startling pace of the Red Bulls, will be relieved that his team have a major upgrade package to come for the next race in Hungary in two weeks' time.

BBC: Webber battles to maiden F1 win

Championship leaders Brawn arrived in Budapest with a major upgrade package which includes a new diffuser, rear wing and bodywork and they used Friday's first session to test their new parts with race fuel loads.

BBC: Hamilton top as McLaren set pace

The upgrade comes after web giant Google announced Monday it is developing a free software package for cell phones that would give it a new platform on which to sell ads and services (See "Google Wants Your Phone, Too" and "Google's Call").

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