Yeah i just updated to 3.0.0 and lost all my works and efforts. I guess i should have made a back up of the OS property language files in the language folder (root folder of Joomla).
I guess that's difficult for the developper since when he had a variable or constant, he must had it to this file too, in order to make it appear in that section, i.e there's a new file and you got to overwrite the previous one. That's something i must remember myself next time i update.
