DataTables/DataTables — pull request #72 by ripper234 (2012-07-24 08:50:32+00:00)
Title: Fix: fnUpdate incorrectly updates the entire row if a Date object is passed as the first arg

How to reproduce:

dataTable.fnUpdate(new Date(), 0, 0);

The solution is checking whether mData is instanceof Date before deciding its a row update.