Two quests now I've run into an issue where I (and my friend) completed the required objectives, but upon trying to turn in, pressing "OK" simply does nothing. The "quest completed" sound happens as well as the little flash that occurs behind your character, but the quest doesn't actually complete (no rewards taken, the questgiver is still there with the book icon above his head). These two quests are: Sabitrama and the Diet Medicine: The Ellinia JQ where you get the 20x Pink Anthurium for Sabitrama. and To the Desert...: A quest where Manji (Man Ji?) in Perion warps you to the desert. I've looked for other threads like this but I only found ones that talked about some common quest bug that stops EXP gains / monster respawns / etc. This bug has no other impact on my gaming outside of simply being unable to turn in these 2 quests.
This is the thread you may be referring to, the respawn and exp issue has been fixed but not the quest bug itself. http://royals.ms/forum/showthread.php?t=7426
These quests actually work fine but they have been affected by a random quest bug that doesn't allow you to turn them in. Our developer is working on finding a fix for this. Check out this link for an explanation (right at the bottom): http://royals.ms/forum/showthread.php?t=7426