Log Message:-----------Add a troubleshoting entry about "libguile.so.17: undefined symbol:pthread_create" error.
Modified Files:-------------- plscheme: README.plscheme (r1.8 -> r1.9) (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plscheme/plscheme/README.plscheme.diff?r1=1.8&r2=1.9)
