Thanks for reporting this. The problem you are describing could be an issue with X (see for instance bug 81174 which will appreciate a confirmation if this is the case). I'm leaving the bug report open as a wishlist against ubiquity for a drop-down list.
** Changed in: ubiquity (Ubuntu) Importance: Undecided => Wishlist -- [Feisty Herd 3] installer timezone map slow to zoom https://launchpad.net/bugs/84031 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
