"Add Another Item" broken after using different modal-frame dependent modules

Issue Summary

I'm not entirely sure what module to post this bug report under...I've been searching for a solution for a couple of hours and it doesn't appear anyone else has had similar problems.

The error occurs when using the modules Modal Node Reference and Node Relationships--two modules that enhance Node Reference by allowing creation of a referenced node in a modal frame popup.

Using either module everything seems to work fine--I'm able to create a new node, it is created successfully and inserted into the node reference field.

Then, if I click "Add Another Item" on the node reference OR any other field on the node form, the field disappears. Simple as that.

It is kicking one javascript error: uncaught exception: Syntax error, unrecognized expression: #

This happens on all different browsers and operating systems. I'm using dev versions of jquery update, jquery ui, modal frame api, on before unload & either node reference module. I'm using Rubik theme on node editing forms.

If anyone knows that this should be posted under a different project then I apologize...please let me know. Also accepting any advice on debugging this error.