Need some confirmation

This puzzle has been driving me nuts for the last couple of days (it's from last week's Hindu):

* * * * 4 3 * 9 *
* 2 * * 9 * * * 6
* 5 * 6 * * * * 1
* 7 6 * * * * 4 *
* * * 4 * 8 * * *
* 3 * * * * 2 5 *
5 * * * * 4 * 7 *
3 * * * 1 * * 6 *
* 8 * 5 7 * * * *

My Smalltalk program chokes on this as well. Is this an invalid puzzle (can a Sudoku puzzle be invalid?)? Going to give it a concerted effort today; if I still can't figure it out, going to chuck it.

(My Two Step Program didn't work, obviously. Still being drawn to these blasted things).