in
/modules/ujIpsumjam/include.php
In the _init() function there is this line:
jrCore_register_module_feature('jrCore', 'editor_button', 'ujIpsumJam', 'on');
It can be commented out or removed.
That line is asking TinyMCE to add an extra button to its system. Its the code you use if you want to add a button like the jrEmbed has added its button to TinyMCE.
IpsumJam is adding itself to the jrEmbed popup a couple of lines before.
The result is TinyMCE is expecting to find the button config file at:
http://jr500.iixxii.cc/modules/ujIpsumJam/tinymce/plugin.min.js?v=1.0.4
Its not finding it and its throwing a small error in the console.