Version:            (using KDE 4.2.2)
Compiler:          gcc (Ubuntu 4.3.3-5ubuntu4) 4.3.3 
OS:                Linux
Installed from:    Ubuntu Packages

If I accept an invite for an event that is scheduled in a different timezone, then the event appears one day early in my korganizer week view.

This also occurs if I manually import an ics file that describes an event.

In the email 'summary' of the event (ie, the pane in kmail that shows the event details before accepting the invite), the date is correct (and specified in the local timezone). If I open the event summary from korganizer nce I've added it, the details are correct (but specified in the remote timezone).

The following iCal fragment will reproduce the problem for me:

BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:REQUEST
BEGIN:VEVENT
DTSTART:20090706T220000Z
DTEND:20090706T230000Z
DTSTAMP:20090703T002547Z
ORGANIZER;CN=Jeremy Kerr:mailto:jk@ozlabs.org
UID:0@pingu
CREATED:20090703T002546Z
DESCRIPTION:Test description
LOCATION:Test location
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY:Test event
TRANSP:OPAQUE
END:VEVENT
END:VCALENDAR

Korganizer is configured with the 'Australia/Sydney' timezone, and my OS is configured with TZ=Australia/Canberra (both equivalent). At present, this is 10 hours ahead of UTC. The event above will display in the week view at 8am on the 6th of July, but should display at 8am on the 7th.

Unfortunately, I've called into a few meetings one day early, leading to much embarrassment on my part :D