The ItemFrame for Frame #{0] couldn''t found! Is the ItemFrame broken?

[robotnikthingy]

What steps will reproduce the problem?

1. Install the plugin
2. Use the /fp multiset command, using http://i.imgur.com/xrwiRql.jpg as the picture
   3.Restart server
3. Frames are blank

What is the expected output? What do you see instead?
Frames should have a picture in them. Instead they are blank and frames.yml is wiped

What version of the product are you using?
FramePicture v1.6.9

Do you have an error log of what happened?
Here is what is shown on server startup
http://pastebin.com/eLJvDay2

Please provide any additional information below.
The item frames were located in a world other than the main world. I assume though this plugin supports multiple worlds