Hi Misha,
Yes, the first problem is it used the default time zone because you had not specified yours. I should probably make a checklist of steps to do after installation to clarify this, I will try to get to that soon.
If the default is set correctly and the user time zone is set correctly it all works as it should and dates are stored as utc and adjusted to user time zone for authenticated users and preferred time zone for not authenticated. It can also be a problem if the db is on a different machine and the time is not in sync with the web server time.
Thanks for letting me know about the pageguid bug, I will look into it. Its not causing any functional bug, but it needs to be fixed.
Best,
Joe