diff -Naurd mpfr-2.3.0-a/PATCHES mpfr-2.3.0-b/PATCHES
--- mpfr-2.3.0-a/PATCHES	2007-10-05 12:20:54.000000000 +0000
+++ mpfr-2.3.0-b/PATCHES	2007-10-05 12:21:12.000000000 +0000
@@ -0,0 +1 @@
+mpfr_atan2
diff -Naurd mpfr-2.3.0-a/VERSION mpfr-2.3.0-b/VERSION
--- mpfr-2.3.0-a/VERSION	2007-09-03 00:02:12.000000000 +0000
+++ mpfr-2.3.0-b/VERSION	2007-10-05 12:21:06.000000000 +0000
@@ -1 +1 @@
-2.3.0-p2
+2.3.0-p3
diff -Naurd mpfr-2.3.0-a/atan2.c mpfr-2.3.0-b/atan2.c
--- mpfr-2.3.0-a/atan2.c	2007-08-29 10:18:11.000000000 +0000
+++ mpfr-2.3.0-b/atan2.c	2007-10-05 12:21:01.000000000 +0000
@@ -170,6 +170,7 @@
     /* use atan2(y,x) = atan(y/x) */
     for (;;)
       {
+        mpfr_clear_flags ();
         if (mpfr_div (tmp, y, x, GMP_RNDN) == 0)
           {
             /* Result is exact. */
diff -Naurd mpfr-2.3.0-a/mpfr.h mpfr-2.3.0-b/mpfr.h
--- mpfr-2.3.0-a/mpfr.h	2007-09-03 00:02:12.000000000 +0000
+++ mpfr-2.3.0-b/mpfr.h	2007-10-05 12:21:06.000000000 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 2
 #define MPFR_VERSION_MINOR 3
 #define MPFR_VERSION_PATCHLEVEL 0
-#define MPFR_VERSION_STRING "2.3.0-p2"
+#define MPFR_VERSION_STRING "2.3.0-p3"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-2.3.0-a/tests/tatan.c mpfr-2.3.0-b/tests/tatan.c
--- mpfr-2.3.0-a/tests/tatan.c	2007-08-29 10:18:10.000000000 +0000
+++ mpfr-2.3.0-b/tests/tatan.c	2007-10-05 12:21:01.000000000 +0000
@@ -405,6 +405,40 @@
   mpfr_clears (a, x, y, (void *) 0);
 }
 
+/* Bug found by Robert Bajema (regression in MPFR 2.3.0).
+   The cause is the underflow flag set before the mpfr_atan2 call. */
+static void
+atan2_bug_20071003 (void)
+{
+  mpfr_t a, x, y, z;
+
+  mpfr_inits (a, x, y, z, (void *) 0);
+
+  mpfr_set_underflow ();
+  mpfr_set_str_binary (y,
+    "-0.10100110110100110111010110111111100110100010001110110E2");
+  mpfr_set_str_binary (x,
+    "0.10100101010110010100010010111000110110011110001011110E3");
+  mpfr_set_str_binary (z,
+    "-0.11101111001101101100111011001101000010010111101110110E-1");
+  mpfr_atan2 (a, y, x, GMP_RNDN);
+  if (! mpfr_equal_p (a, z))
+    {
+      printf ("mpfr_atan2 fails on:\n");
+      printf ("  y = ");
+      mpfr_dump (y);
+      printf ("  x = ");
+      mpfr_dump (x);
+      printf ("Expected ");
+      mpfr_dump (z);
+      printf ("Got      ");
+      mpfr_dump (a);
+      exit (1);
+    }
+
+  mpfr_clears (a, x, y, z, (void *) 0);
+}
+
 int
 main (int argc, char *argv[])
 {
@@ -414,6 +448,7 @@
   special ();
   special_atan2 ();
   smallvals_atan2 ();
+  atan2_bug_20071003 ();
 
   test_generic_atan  (2, 200, 17);
   test_generic_atan2 (2, 200, 17);
diff -Naurd mpfr-2.3.0-a/version.c mpfr-2.3.0-b/version.c
--- mpfr-2.3.0-a/version.c	2007-09-03 00:02:12.000000000 +0000
+++ mpfr-2.3.0-b/version.c	2007-10-05 12:21:06.000000000 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "2.3.0-p2";
+  return "2.3.0-p3";
 }