I can confirm that this appears to have been fixed in Feisty.
Feisty Herd5
Kernel: 2.6.20-11-generic
GNOME: 2.18.0(Ubuntu 2007-03-13)
I can also confirm that it's still broken in Dapper.
Thought about copying the /usr/share/evolution-data-server-1.8/zoneinfo/ files over from Feisty, but I suspect that wouldn't be a real 'fix' after looking at Sebastien Bacher's proposed change file.
I can confirm that this appears to have been fixed in Feisty.
Feisty Herd5
Kernel: 2.6.20-11-generic
GNOME: 2.18.0(Ubuntu 2007-03-13)
I can also confirm that it's still broken in Dapper.
Thought about copying the /usr/share/ evolution- data-server- 1.8/zoneinfo/ files over from Feisty, but I suspect that wouldn't be a real 'fix' after looking at Sebastien Bacher's proposed change file.