You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
ValveTime.co.uk | Valve News, Forums, Steam
I was expecting problems, but from reading all the topics on various forums it really doesn't look like valve have done a very good job with steam, authentication, offline mode, the installation process as a whole, not to mention the sound/hardware problems, reboots, etc.
I mean something like installation not working when you deselect CS:S is something that really should have been picked up with testing.