In the visitor log I see that users that came to site between 00 and 01 a.m. are logged in yesterday log. They should be logged in today log.
I'm in +1 timezone offset, maybe users are logged using UTC time?
Replying to saldsl:
Yes, it seems... sorry, I searched for that, but with wrong keywords.
Quoting vipsoft :
No worries. Feedback is how we make Piwik better, gauging interest, identifying pain points, etc.