Hey there Woo Gents -
There is currently an issue being reported by Codestyling Localization that is preventing the included translations from being picked up by a localized install and also prevents any changes using the english file from taking effect. We have confirmed this in a few Woo themes and also our own.
The error is:
Loading Issue: Author is using load_textdomain instead of load_plugin_textdomain function. This may break behavior of WordPress, because some filters and actions won't be executed anymore. Please contact the Author about that.