Here's what you'll do (within 24 hours) when we sound the alarm:
You need to be extremely cautious and always ensure you're working on your
test-release candidate system and not your production system. It's too easy
to confuse them since they'll look identical. We recommend you change the
#content-wrapper #page-title theme background color on your test system
to orange or another screamer.
Remember: You must never try to continue using the alpha release after
the testing period is over because those bits are unstable -- meaning
we often make changes in the final release that your system would
never pick-up during a future update.