I was looking for a related ticket, nothing remaining found.
Since this is a very general problem (and already core team agreed that there's a need to upgrade the code for timezone related information), i posted it as a general bug ticket.
Sorry, that's pretty much to do. I expect we need a rewrite.
I suggested some starting point...
Ticket:
joomlacode.org/gf/project/fireboard/trac...tracker_item_id=6661
Sadly.. i don't know where the solution of this problem could be found on the timetable.
Please wait .-)