UPDATE: 0.6.1 is a bug fix release. Apparently xCHM 0.6 and prior did not compile if wxString was compiled with Unicode support. Thanks go to Stefano Caselli, who signaled the problem and was kind and patient enough to test the release candidates on his Unicode enabled system, and Sean Crotty for signaling the problem and for recompiling the code to see if the problem was still there. http://sourceforge.net/projects/xchm