From: Peter Jones <pjones@redhat.com>

diff -urpN grub-0.97/stage2/char_io.c.lowercase grub-0.97/stage2/char_io.c
--- grub-0.97/stage2/char_io.c.lowercase	2009-04-07 15:06:37.000000000 -0400
+++ grub-0.97/stage2/char_io.c	2009-04-07 15:07:19.000000000 -0400
@@ -1346,6 +1346,26 @@ substring (const char *s1, const char *s
   return 1;
 }
 
+int
+subcasestring (const char *s1, const char *s2)
+{
+  while (tolower(*s1) == tolower(*s2))
+    {
+      /* The strings match exactly. */
+      if (! *(s1++))
+	return 0;
+      s2 ++;
+    }
+
+  /* S1 is a substring of S2. */
+  if (*s1 == 0)
+    return -1;
+
+  /* S1 isn't a substring. */
+  return 1;
+}
+
+
 #ifndef STAGE1_5
 /* Terminate the string STR with NUL.  */
 int
diff -urpN grub-0.97/stage2/fsys_fat.c.lowercase grub-0.97/stage2/fsys_fat.c
--- grub-0.97/stage2/fsys_fat.c.lowercase	2009-04-07 15:06:21.000000000 -0400
+++ grub-0.97/stage2/fsys_fat.c	2009-04-07 15:06:56.000000000 -0400
@@ -435,7 +435,7 @@ fat_dir (char *dirname)
 		goto print_filename;
 # endif /* STAGE1_5 */
 	      
-	      if (substring (dirname, filename) == 0)
+	      if (subcasestring (dirname, filename) == 0)
 		break;
 	    }
 	}
@@ -462,7 +462,7 @@ fat_dir (char *dirname)
       if (do_possibilities)
 	{
 	print_filename:
-	  if (substring (dirname, filename) <= 0)
+	  if (subcasestring (dirname, filename) <= 0)
 	    {
 	      if (print_possibilities > 0)
 		print_possibilities = -print_possibilities;
@@ -472,7 +472,7 @@ fat_dir (char *dirname)
 	}
 # endif /* STAGE1_5 */
       
-      if (substring (dirname, filename) == 0)
+      if (subcasestring (dirname, filename) == 0)
 	break;
     }
   
diff -urpN grub-0.97/stage2/shared.h.lowercase grub-0.97/stage2/shared.h
--- grub-0.97/stage2/shared.h.lowercase	2009-04-07 15:06:29.000000000 -0400
+++ grub-0.97/stage2/shared.h	2009-04-07 15:07:01.000000000 -0400
@@ -941,6 +941,7 @@ char *convert_to_ascii (char *buf, int c
 int get_cmdline (char *prompt, char *cmdline, int maxlen,
 		 int echo_char, int history);
 int substring (const char *s1, const char *s2);
+int subcasestring (const char *s1, const char *s2);
 int nul_terminate (char *str);
 int get_based_digit (int c, int base);
 int safe_parse_maxint (char **str_ptr, int *myint_ptr);