The AVRDUDE that came with Arduino 0019 is...
10/12/2007 02:12 AM 1,922,788 avrdude.exe
avrdude -v
avrdude: Version 5.4-arduino, compiled on Oct 11 2007 at 19:12:32
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
What version is in the "C:\WinAVR-20100110\bin" directory?
Are there any other versions on your computer?