Is this a bug in the upstream or just Ubuntu (10.04LTS)?

The GMT-x and GMT+x in the "ETC" section are flipped/backwards. (Arizona should be GMT-7, but equates to GMT+7). Quito/Bogota should be GMT-5, but GMT-5 is giving GMT+5. See: https://bugs.launchpad.net/ubuntu/+source/tzdata/+bug/720792