Could you be a bit more specific about what the trouble is?
For instance, is the trouble
A. that when you create a new appointment, it appears in your calendar one hour off, or
B. that when you get an alert reminder for an appointment, it occurs one hour off, or
C. something else?
What makes you think it is a daylight saving problem?
Generally, the more specific an example you give, the more likely you are to receive some useful help.
In the meantime, can I recommend the following DesktopLinux article
http://www.desktoplinux.com/news/NS3988059943.html. In particular, it contains a link to a DST time check site that you can use to verify your AAO's DST settings.
http://www.dst.cdes.umn.edu/
(Ephraim Tutt, taking on the cases nobody else wants)