diff -durp mutt-1.3.22.1/doc/manual.sgml mutt-1.3.22.1.oe.%_.1/doc/manual.sgml
--- mutt-1.3.22.1/doc/manual.sgml	Wed Sep  5 02:52:17 2001
+++ mutt-1.3.22.1.oe.%_.1/doc/manual.sgml	Wed Sep  5 03:01:26 2001
@@ -4103,6 +4103,7 @@ stashed the message: list name or recipi
 (2) at the top of a thread, or (3) `x-label' is different from
 preceding message's `x-label'.
 <tag>&percnt;Z </tag>message status flags
+<tag>&percnt;_ </tag>toggle conversion to lowercase of subsequent &percnt;-expansions
 <tag>&percnt;{fmt} </tag>the date and time of the message is converted to sender's
 time zone, and ``fmt'' is expanded by the library function
 ``strftime''; a leading bang disables locales
diff -durp mutt-0.94.12/hdrline.c mutt-0.94.12.oe.%_.1/hdrline.c
--- mutt-0.94.12/hdrline.c	Tue Oct 13 13:45:13 1998
+++ mutt-0.94.12.oe.%_.1/hdrline.c	Tue Oct 13 17:10:22 1998
@@ -685,6 +685,10 @@ hdr_format_str (char *dest,
   else if (flags & M_FORMAT_OPTIONAL)
     mutt_FormatString (dest, destlen, elsestring, hdr_format_str, (unsigned long) hfi, flags);
 
+  /* Convert the result of the expansion to lowercase if that was specified. */
+  if (flags & M_FORMAT_LOWERCASE)
+    mutt_strlower (dest);
+
   return (src);
 #undef THREAD_NEW
 #undef THREAD_OLD
diff -durp mutt-0.94.12/muttlib.c mutt-0.94.12.oe.%_.1/muttlib.c
--- mutt-0.94.12/muttlib.c	Tue Oct 13 13:45:26 1998
+++ mutt-0.94.12.oe.%_.1/muttlib.c	Tue Oct 13 17:10:58 1998
@@ -911,6 +911,15 @@ void mutt_FormatString (char *dest,		/* 
 	continue;
       }
 
+      /* toggle lowercasing of alphabetical chars in an expansion string */
+      if (*src == '_')
+      {
+        flags = flags & M_FORMAT_LOWERCASE ? flags & ~M_FORMAT_LOWERCASE
+                                           : flags | M_FORMAT_LOWERCASE;
+        src++;
+        continue;
+      }
+
       if (*src == '?')
       {
 	flags |= M_FORMAT_OPTIONAL;
diff -durp mutt-0.94.12/mutt.h mutt-0.94.12.oe.%_.1/mutt.h
--- mutt-0.94.12/mutt.h	Tue Oct 13 13:45:35 1998
+++ mutt-0.94.12.oe.%_.1/mutt.h	Tue Oct 13 17:11:25 1998
@@ -132,7 +132,8 @@ typedef enum
   M_FORMAT_OPTIONAL	= (1<<3),
   M_FORMAT_STAT_FILE	= (1<<4), /* used by mutt_attach_fmt */
   M_FORMAT_ARROWCURSOR	= (1<<5), /* reserve space for arrow_cursor */
-  M_FORMAT_INDEX	= (1<<6)  /* this is a main index entry */
+  M_FORMAT_INDEX	= (1<<6), /* this is a main index entry */
+  M_FORMAT_LOWERCASE	= (1<<7)  /* print the alpha chars in lower case */
 } format_flag;
 
 /* types for mutt_add_hook() */
--- mutt-0.94.7i/patchlist.c.orig	Sat Sep 19 02:29:51 1998
+++ mutt-0.94.7i/patchlist.c	Sat Sep 19 02:54:16 1998
@@ -16,6 +16,8 @@
 
 
 
+  printf("Feature patch: %%_                   0.94.12 by O'Shaughnessy Evans\n");
+
 
 
   /* DO NOT MODIFY AFTER THIS LINE */