Mash-up issue with drag and drop and document.writeln

Dragging something with a 'document.writeln' in it causes the page to break. Here is an example:

http://build.fluidproject.org/sakai-imagegallery-tool/tests/fluid-tests/manual/jQueryDnD/writeln.html

To replicate the issue, try to drag 'Item 1'.

I encountered this problem when using jQuery drag an drop in a learning management system that already contained some javascript. We wanted to drag sections of the page around to change the layout. One of the sections of the page had an existing script that contained a call to 'document.writeln'.