Beginning with version 1.6, WSJT-X now uses an improved version of the k9an wspr decoder that was developed in a collaboration between K9AN and K1JT. The version used in WSJT-X has been carefully optimized for excellent weak-signal decoding capability while maintaining a low probability of false decodes and minimizing execution time. For the latest wsprd code, visit the WSJT-X svn repository at http://sourceforge.net/projects/wsjt/. 73, Steve k9an