--- unif.c.~1.137.~	2003-09-13 09:34:18.000000000 +1000
+++ unif.c	2003-12-19 15:22:10.000000000 +1000
@@ -1,4 +1,5 @@
-/* Copyright (C) 1995,1996,1997,1998,2000,2001 Free Software Foundation, Inc.
+/* Copyright (C) 1995,1996,1997,1998,2000,2001,2003 Free Software
+ * Foundation, Inc.
  * 
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -72,6 +73,7 @@
  */
 
 scm_t_bits scm_tc16_array;
+static SCM exactly_one_third;
 
 /* return the size of an element in a uniform array or 0 if type not
    found.  */
@@ -175,6 +177,15 @@
       else
 	type = scm_tc7_ivect;
     }
+  else if (SCM_FRACTIONP (prot))
+    {
+      /* The manual says "1/3" is the prototype for a "double".  This was
+         fine before fractions existed, 1/3 gave a flonum which didn't fit a
+         "float" (not without rounding).  But now we need to check for this
+         value explicitly (to maintain upward compatibility).  */
+      if (scm_num_eq_p (exactly_one_third, prot))
+        goto dvect;
+    }
   else if (SCM_SYMBOLP (prot) && (1 == SCM_SYMBOL_LENGTH (prot)))
     {
       char s;
@@ -213,6 +224,7 @@
     }
   else
     {
+    dvect:
       i = sizeof (double) * k;
       type = scm_tc7_dvect;
     }
@@ -574,7 +586,11 @@
       else if (SCM_SYMBOLP (prot))
 	scm_array_fill_x (answer, SCM_MAKINUM (0));
       else
-	scm_array_fill_x (answer, prot);
+        {
+          if (SCM_FRACTIONP (prot) && scm_num_eq_p (exactly_one_third, prot))
+            prot = scm_exact_to_inexact (prot);
+          scm_array_fill_x (answer, prot);
+        }
       return answer;
     }
   
@@ -599,7 +615,11 @@
   else if (SCM_SYMBOLP (prot))
     scm_array_fill_x (ra, SCM_MAKINUM (0));
   else
-    scm_array_fill_x (ra, prot);
+    {
+      if (SCM_FRACTIONP (prot) && scm_num_eq_p (exactly_one_third, prot))
+        prot = scm_exact_to_inexact (prot);
+      scm_array_fill_x (ra, prot);
+    }
 
   if (1 == SCM_ARRAY_NDIM (ra) && 0 == SCM_ARRAY_BASE (ra))
     if (s->ubnd < s->lbnd || (0 == s->lbnd && 1 == s->inc))
@@ -2585,6 +2605,8 @@
   scm_set_smob_free (scm_tc16_array, array_free);
   scm_set_smob_print (scm_tc16_array, scm_raprin1);
   scm_set_smob_equalp (scm_tc16_array, scm_array_equal_p);
+  exactly_one_third = scm_permanent_object (scm_make_ratio (SCM_MAKINUM (1),
+                                                            SCM_MAKINUM (3)));
   scm_add_feature ("array");
 #include "libguile/unif.x"
 }