Nop, it would be too difficult for the user ^^
This is a Bukkit bug. I am not able to fix that, sorry.
So it happens only on new chunks ?
This might be a bug. Are you sure that the melt does not work when you wait a little bit ?
I do not understand your problem ?
Does the manipulation provided in the last message works ?
Nop. Follow these steps :
Your server must be stopped.
If you have any other error, please post it ;)
You have to modify the chmod of config.yml through any FTP client.
Like what ?