Zyndstoff,
thanks for reporting this, seems to be a Firefox 3.x bug related to reading of the localization files. For whatever reason Firefox ignores the string on the 1st line and proceeds to load strings from the 2ns line onwards. Up to now we were not using the string on the 1st line but started to do so recently. This lead to the extension malfunction. We shall insert a dummy entry on the 1st line - this fixes the issue. Firefox 4 users are not affected by this bug.