diff --git a/src/interfaces/ecpg/ChangeLog b/src/interfaces/ecpg/ChangeLog
index 95605f475f..7a2ca24700 100644
--- a/src/interfaces/ecpg/ChangeLog
+++ b/src/interfaces/ecpg/ChangeLog
@@ -2155,3 +2155,10 @@ We 8. Nov 10:53:42 CET 2006
 	- Applied patch by Peter Harris to free auto_mem struct in ECPGconnect.
 	- Set ecpg library version to 5.2.
 	- Set ecpg version to 4.2.1.
+
+Th 25. Jan 17:17:01 CET 2007
+
+	- Removed compiler warning due to unneeded unsigned declaration.
+	- Removed regression test that triggers those libc precision bugs on some archs.
+	- Set ecpg library version to 5.3.
+	- Set ecpg version to 4.3.1.
diff --git a/src/interfaces/ecpg/ecpglib/extern.h b/src/interfaces/ecpg/ecpglib/extern.h
index d5d44a79c0..45a182a0d4 100644
--- a/src/interfaces/ecpg/ecpglib/extern.h
+++ b/src/interfaces/ecpg/ecpglib/extern.h
@@ -1,4 +1,4 @@
-/* $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/extern.h,v 1.21 2007/01/12 10:00:13 meskes Exp $ */
+/* $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/extern.h,v 1.22 2007/01/25 16:45:25 meskes Exp $ */
 
 #ifndef _ECPG_LIB_EXTERN_H
 #define _ECPG_LIB_EXTERN_H
@@ -40,7 +40,7 @@ void		ECPGfree(void *);
 bool		ECPGinit(const struct connection *, const char *, const int);
 char	   *ECPGstrdup(const char *, int);
 const char *ECPGtype_name(enum ECPGttype);
-unsigned int ECPGDynamicType(Oid);
+int ECPGDynamicType(Oid);
 void		ECPGfree_auto_mem(void);
 void		ECPGclear_auto_mem(void);
 
diff --git a/src/interfaces/ecpg/ecpglib/typename.c b/src/interfaces/ecpg/ecpglib/typename.c
index ebd40fece9..d83356e39d 100644
--- a/src/interfaces/ecpg/ecpglib/typename.c
+++ b/src/interfaces/ecpg/ecpglib/typename.c
@@ -1,4 +1,4 @@
-/* $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/typename.c,v 1.10 2003/11/29 19:52:08 pgsql Exp $ */
+/* $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/typename.c,v 1.11 2007/01/25 16:45:25 meskes Exp $ */
 
 #define POSTGRES_ECPG_INTERNAL
 #include "postgres_fe.h"
@@ -66,7 +66,7 @@ ECPGtype_name(enum ECPGttype typ)
 	return NULL;
 }
 
-unsigned int
+int
 ECPGDynamicType(Oid type)
 {
 	switch (type)
diff --git a/src/interfaces/ecpg/test/compat_informix/dec_test.pgc b/src/interfaces/ecpg/test/compat_informix/dec_test.pgc
index 31f365d2e3..02e48b56ce 100644
--- a/src/interfaces/ecpg/test/compat_informix/dec_test.pgc
+++ b/src/interfaces/ecpg/test/compat_informix/dec_test.pgc
@@ -108,9 +108,14 @@ main(void)
 			printf("dec[%d,9]: %s (r: %d - cmp: %d)\n", i, buf, r, q);
 		}
 
-		r = dectodbl(dec, &dbl);
-		if (r) check_errno();
-		printf("dec[%d,10]: %g (r: %d)\n", i, r?0.0:dbl, r);
+		if (i != 6)
+		{
+			/* underflow does not work reliable on several archs, so not testing it here */
+			/* this is a libc problem since we only call strtod() */
+			r = dectodbl(dec, &dbl);
+			if (r) check_errno();
+			printf("dec[%d,10]: %g (r: %d)\n", i, r?0.0:dbl, r);
+		}
 
 		PGTYPESdecimal_free(din);
 		printf("\n");
diff --git a/src/interfaces/ecpg/test/expected/compat_informix-dec_test.c b/src/interfaces/ecpg/test/expected/compat_informix-dec_test.c
index d71be24e4e..35cd432820 100644
--- a/src/interfaces/ecpg/test/expected/compat_informix-dec_test.c
+++ b/src/interfaces/ecpg/test/expected/compat_informix-dec_test.c
@@ -129,9 +129,14 @@ main(void)
 			printf("dec[%d,9]: %s (r: %d - cmp: %d)\n", i, buf, r, q);
 		}
 
-		r = dectodbl(dec, &dbl);
-		if (r) check_errno();
-		printf("dec[%d,10]: %g (r: %d)\n", i, r?0.0:dbl, r);
+		if (i != 6)
+		{
+			/* underflow does not work reliable on several archs, so not testing it here */
+			/* this is a libc problem since we only call strtod() */
+			r = dectodbl(dec, &dbl);
+			if (r) check_errno();
+			printf("dec[%d,10]: %g (r: %d)\n", i, r?0.0:dbl, r);
+		}
 
 		PGTYPESdecimal_free(din);
 		printf("\n");
diff --git a/src/interfaces/ecpg/test/expected/compat_informix-dec_test.stdout b/src/interfaces/ecpg/test/expected/compat_informix-dec_test.stdout
index 1b52378538..1f8675b3f3 100644
--- a/src/interfaces/ecpg/test/expected/compat_informix-dec_test.stdout
+++ b/src/interfaces/ecpg/test/expected/compat_informix-dec_test.stdout
@@ -69,7 +69,6 @@ dec[6,6]: 0 (r: 0)
 dec[6,7]: 0.00 (r: 0 - cmp: 1)
 dec[6,8]: 0 (r: 0)
 dec[6,9]: 0.00 (r: 0 - cmp: 1)
-(errno == PGTYPES_NUM_UNDERFLOW) - dec[6,10]: 0 (r: -1)
 
 dec[7,1]: r: 0, 0.001
 dec[7,2]: r: 0, 0
diff --git a/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.c b/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.c
index 9b6bada22a..444779e811 100644
--- a/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.c
+++ b/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.c
@@ -120,9 +120,16 @@ main(void)
 			free(text);
 		}
 
-		r = PGTYPESnumeric_to_double(num, &d);
-		if (r) check_errno();
-		printf("num[%d,10]: %g (r: %d)\n", i, r?0.0:d, r);
+		if (i != 6)
+		{
+			/* underflow does not work reliable on several archs, so not testing it here */
+			/* this is a libc problem since we only call strtod() */
+
+			r = PGTYPESnumeric_to_double(num, &d);
+			if (r) check_errno();
+			printf("num[%d,10]: %g (r: %d)\n", i, r?0.0:d, r);
+		}
+
 		/* do not test double to numeric because
 		 * - extra digits are different on different architectures
 		 * - PGTYPESnumeric_from_double internally calls PGTYPESnumeric_from_asc anyway
diff --git a/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.stdout b/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.stdout
index 6c93632ca3..51a74594ea 100644
--- a/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.stdout
+++ b/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.stdout
@@ -88,7 +88,6 @@ num[6,6]: 0 (r: 0)
 num[6,7]: 0.00 (r: 0 - cmp: 1)
 num[6,8]: 0 (r: 0)
 num[6,9]: 0.00 (r: 0 - cmp: 1)
-(errno == PGTYPES_NUM_UNDERFLOW) - num[6,10]: 0 (r: -1)
 num[6,11]: - (r: 0)
 num[6,12]: 0.00 (r: 0 - cmp: 0)
 
diff --git a/src/interfaces/ecpg/test/pgtypeslib/num_test2.pgc b/src/interfaces/ecpg/test/pgtypeslib/num_test2.pgc
index 5a884f1040..0b2a2e654c 100644
--- a/src/interfaces/ecpg/test/pgtypeslib/num_test2.pgc
+++ b/src/interfaces/ecpg/test/pgtypeslib/num_test2.pgc
@@ -101,9 +101,16 @@ main(void)
 			free(text);
 		}
 
-		r = PGTYPESnumeric_to_double(num, &d);
-		if (r) check_errno();
-		printf("num[%d,10]: %g (r: %d)\n", i, r?0.0:d, r);
+		if (i != 6)
+		{
+			/* underflow does not work reliable on several archs, so not testing it here */
+			/* this is a libc problem since we only call strtod() */
+
+			r = PGTYPESnumeric_to_double(num, &d);
+			if (r) check_errno();
+			printf("num[%d,10]: %g (r: %d)\n", i, r?0.0:d, r);
+		}
+
 		/* do not test double to numeric because
 		 * - extra digits are different on different architectures
 		 * - PGTYPESnumeric_from_double internally calls PGTYPESnumeric_from_asc anyway