In late 2008, a revised 2008 10-taka note appeared in circulation. Whereas the previous three small-size 10-taka notes have the national emblem and text intaglio printed, the new note is entirely offset printed, as was the case for this denomination before September 2006. The easiest way to distinguish between the two 2008-dated notes is to compare the text on the front. The earlier note has brown text directly on the underprinting (see top set of scans below) whereas the newer note has the text surrounded by a white background (see bottom set of scans below). The backs appear to be identical.
Courtesy of Sejin Ahn.