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ValveTime.co.uk | Valve News, Forums, Steam
It would be great if Valve would address this issue. I am not the only one who is experiencing this, and I'm sure we would all appreciate it if you fixed the error that is causing many of us to not be able to play for more than 30 minutes at a time.
I have encolsed a screen shot to show you EXACTLY what the problem is. This happened to me about 3 minutes ago.