Download - 8.6MB http://download.mozilla.org/?product=firef...sx〈=en-US
Should you decide to use the "update" feature within your version 1.0, it will not be pulling down the update right now because the firefox team decided to stagger the update to alleviate the potential stress that the servers will undergo.
If you don't want to wait for your localized version, first uninstall the version 1.0. Then proceed to install the 1.01. The various customization from version 1.0 is retained and will port over to the new one transparently. Just do not go into your home directory and manually purge those user customization files and you will be fine.