Uncaught TypeError After Cancelling Dragging an Issue on Wall

Following error seen when attempting to drag an issue between columns on the board.

o	Exception: TypeError: A is undefined
o	Resource: http://foo.bar.com/s/en_UK-uu1jxh-418945332/843/36/87a4b5ca79e66377d7481344ca5f0453/_/download/contextbatch/js/gh-rapid/batch.js
o	Line: 3481
Environment
Mozilla/5.0 (Windows NT 5.1; rv:22.0) Gecko/20100101 Firefox/22.0

The steps to reproduce are as follows:

1) Implement workaround #1 for:

Unable to set issues to Resolved using Greenhopper Simplified Workflow

Thus, dragging an issue to "Done" now displays a transition screen.

2) When you've dragged an to "Done" so that the screen is displayed, do not submit it. Press Cancel or Esc. ie, you've decided that you selected the wrong issue.

3) The issue now displays in a "horizontally truncated" form.

4) Now try to drag any other issue on the board... you'll get the TypeEror.

There's nothing logged. And when you see the issue displaying funny (#3 above) you can just refresh the screen and avoid the TypeError. This is why I have logged as Minor.