+.B ignoreUninstalledPrograms\fP (class \fBBoolean\fP)
+There may be programs in the list that are not installed on the system,
+yet are marked as "enabled." If this preference is true, then such
+programs will simply be ignored. If false, then a warning will be printed
+if an attempt is made to run the nonexistent program. Also, the
+.BR xscreensaver-demo (1)
+program will suppress the non-existent programs from the list if this
+is true. Default: false.
+.TP 8