Elementalist skill “Glyph of Renewal” says: “Fire: Revive an ally; you’re revived the next time you’re downed.”
http://wiki.guildwars2.com/wiki/Glyph_of_Renewal
Maybe my english is bad. I thought that next time means “the closest moment in the future when the specific thing happens”.
As far as I noticed the skill works if you are downed in 1 minute after using it. Maybe in 2 minutes. After that I never get revived when downed. I would not call that “next time”.
Maybe you should update the description. The game is out since the end of August.