hey i think i spotted an error

[parsingeye]

No description provided.

[kokers]

It's not error. If no new_keys have been added then this variable isn't set (that mean I just edited existing keys), OR if there is (that mean new keys where added) I need to check if it's not empty and if it's array. Just in case ;o)
Basically you want to save file if there are new keys or not. So if you change !isset to isset then you will not be able to save file after just editing existing keys (no new keys added). I hope you understand what i mean because I'm very tired and don;t have time to check my grammar ;o))

check if you can save file by just editing existing key after you changed that and let me know. :o)