[jQuery] jeditable tooltip for empty table cell becomes content

New demonstration case for another problem I've noticed with
jeditable:

http://apache.pastebin.ca/1270021

I'm making cells in a table editable, and passing jeditable a string
for the hover tooltip. However, if the cell in question has no
content (e.g., <td></td>) jeditable stuffs the tooltip into the
element as its value.

Once again, am I doing something wrong, or is this a bug I should
report?

Thanks..