diff --git a/scripts/debug/.cvsignore b/scripts/debug/.cvsignore
index 347aa86b8..ea97d080c 100644
--- a/scripts/debug/.cvsignore
+++ b/scripts/debug/.cvsignore
@@ -2,3 +2,4 @@ Makefile
 Makefile.in
 core*
 fgfs.supp
+.gdbinit
diff --git a/scripts/debug/debug-fgfs b/scripts/debug/debug-fgfs
index 5383bda02..8683db297 100755
--- a/scripts/debug/debug-fgfs
+++ b/scripts/debug/debug-fgfs
@@ -53,7 +53,7 @@ while true; do
 	-i)	cmd=""; gdb="" ;;
 	-b)	gdb="" ;;
 	-x)	extra="--single-step=yes --optimise=no --cleanup=no --dump-error=1" ;;
-	-c)	core=$(ls -t core*|head -1)
+	-c)	core=$(ls -t core* 2>/dev/null|head -1)
 		if test -z $core; then
 			echo "$0: there's no core file"
 			exit 1
@@ -66,7 +66,7 @@ while true; do
 done
 
 if ! test -e "$fgfs"; then
-	echo "$0: there's no fgfs exectuable $fgfs"
+	echo "$0: there's no fgfs executable $fgfs"
 	exit 2
 fi
 
diff --git a/scripts/debug/sample.fgfs.supp b/scripts/debug/sample.fgfs.supp
index 30519190e..6b692f48b 100644
--- a/scripts/debug/sample.fgfs.supp
+++ b/scripts/debug/sample.fgfs.supp
@@ -4,7 +4,7 @@
 # {
 #     name_of_suppression
 #     kind: one of Param Value1 Value2 Value4 Value8
-#               Cond Free Addr1 Addr2 Addr4 Addr8
+#               Cond Free PThread Addr1 Addr2 Addr4 Addr8
 #     (if Param: name of system call param, if Free: name of free-ing fn)
 #     caller0 name, or /name/of/so/file.so
 #     caller1 name, or ditto
@@ -89,3 +89,12 @@
     Cond
     fun:removeEntity__7ssgListUi
 }
+
+{
+    zlib/pthread-bug(PThread)
+    PThread
+    fun:pthread_error
+    fun:__pthread_mutex_destroy
+    fun:_IO_default_finish
+}
+