This patch allows the player to use '>' to enter a pit or spiked pit, 
just like holes and known trap doors.

I hope this fix helps. Let me know what you think!
Chris Becker (topher@csh.rit.edu)

More bug fixes and patches can be found at 
http://www.csh.rit.edu/~topher/nethack


--- orig-nethack-3.4.3/src/do.c	2003-12-07 18:39:14.000000000 -0500
+++ nethack-3.4.3/src/do.c	2004-01-11 23:36:25.000000000 -0500
@@ -789,7 +796,8 @@
 	}
 	if (!stairs_down && !ladder_down) {
 		if (!(trap = t_at(u.ux,u.uy)) ||
-			(trap->ttyp != TRAPDOOR && trap->ttyp != HOLE)
+			(trap->ttyp != TRAPDOOR && trap->ttyp != HOLE &&
+			 trap->ttyp != PIT && trap->ttyp != SPIKED_PIT)
 			|| !Can_fall_thru(&u.uz) || !trap->tseen) {
 
 			if (flags.autodig && !flags.nopick &&
@@ -821,6 +829,14 @@
 		return(0);
 	}
 
+	/* Move into the pit */
+	if (trap && (trap->ttyp == PIT || trap->ttyp == SPIKED_PIT)) {
+		You("carefully slide down into the %spit", 
+			trap->ttyp == SPIKED_PIT ? "spiked " : "");
+		u.utraptype = TT_PIT;
+		u.utrap = rn1(6,2);
+		return(0);
+	} else {
 	if (trap)
 	    You("%s %s.", locomotion(youmonst.data, "jump"),
 		trap->ttyp == HOLE ? "down the hole" : "through the trap door");
@@ -832,6 +848,7 @@
 		next_level(!trap);
 		at_ladder = FALSE;
 	}
+	}
 	return(1);
 }