Index: w_msgpanel.c
===================================================================
--- w_msgpanel.c
+++ w_msgpanel.c	2009-03-07 12:26:45.000000000 +0100
@@ -588,7 +588,7 @@
 
     strcat(tmpstr,"\n");
     if (update_figs) {
-	fprintf(stderr,tmpstr);
+	fprintf(stderr, "%s", tmpstr);
     } else {
 	/* append this message to the file message widget string */
 	block.firstPos = 0;