It might be a coincidence or I just got very unlucky but 3 days after I installed Mavericks my SSD died in my 2012 MacBook Air. It crashed 3 times and I could not restart it the 4th time.
I tried to reinstall the machine but Disk Utility showed me the drive with a 33kbyte size and format option was disabled.
Apple Service told me it has to be replaced, no way of saving it. Their test system displayed it as a 33kbyte drive as well.
I just got my machine back from service. Do not plan to reinstall Mavericks this time. I am a little sad I installed in the past every developer review of Lion and Mountain Lion as well and never had a problem besides some apps not working like Skype for Mavericks.