Mono-1.1.4 is now build-able on a PPC. Paolo Molaro (a.k.a. lupus[at]ximian[dot]com), a lead developer for the Mono project, has found the source of the "SIGILL bug" and eliminated it: http://svn.myrealbox.com/viewcvs/trunk/mono/mono/mini/exceptions-ppc.c?rev=42122&r1=39710&r2=42122 -Joseph -- joseph_sacco[at]comcast[dot]net