GNOME-panel, calendar; wrong date after midnight

Binary package hint: gnome-panel

Ubuntu 11.04, i386. GNOME2, gnome-panel, calendar

There is a time on my GNOME panel toolbar, in the corner. When I click on the time, calendar is displayed. So far, so good.

I see a problem after midnight. When I click the clock, and it is 17 May (after Midnight), 16 May is highlighted in the calendar. When I close the calendar and click time again, correct day is highlighted. This issue is repeatable. The first action on the calendar shows wrong date (previous day, etc). Calendar state is updated on the exit. I wrote that problem is after midnight but it is more general; it is the first click of the day (when computer was not rebooted since previous day).