Jenson Button has admitted to being "disappointed" with Lewis Hamilton after his McLaren team-mate tweeted sensitive data prior to Sunday's Belgian Grand Prix.
Hamilton posted a picture on Twitter of telemetry data highlighting the difference between his qualifying lap and that of Button the day before.
Button claimed his first pole in 50 races with McLaren, finishing 0.8secs quicker than Hamilton who started the race seventh.
The graphs indicated such vital information as top speeds, tyre pressures and ride height, invaluable to rival engineers.
The disclosure resulted in team principal Martin Whitmarsh ordering Hamilton to remove the offending post, but not before it had been re-tweeted by many of Hamilton's one million followers.
Whitmarsh declared Hamilton's actions as "an error of judgment", deciding not to take any internal disciplinary action.
Rival team boss Christian Horner, however, suggested the matter would have been "a breach of confidentiality" if committed within his team.
Asked as to how he felt about the situation, race-winner Button told national newspapers: "I'll say disappointed.
"We work so hard to improve the car and to keep things like that private.
"I don't think it is for me to be angry with Lewis as it's not a personal thing.
"It's more the information we work so hard to keep secret and private, that was the thing I didn't want to see on Twitter."
Technical director Paddy Lowe further attempted to play down the issue by claiming what was revealed in Hamilton's tweet would not be "of any great use to anyone".
Lowe added: "I don't think there is much damage done. The actual mistake Lewis made, which he understands, is he didn't really appreciate the nature of that information."
He continued: "The engineers don't like to see that because we spend our lives trying to keep things like that secret. So it is more what it represents."