diff -ur escape-src~/upper.cc escape-src/upper.cc
--- escape-src~/upper.cc	2010-01-15 23:40:22.000000000 -0500
+++ escape-src/upper.cc	2010-01-17 23:23:42.747097347 -0500
@@ -364,6 +364,7 @@
     /* everything is rooted within dirname */
     nlf = dirname + DIRSEP + nlf;
 
+    util::remove(nlf);
     FILE * a = util::fopenp(nlf, "wb");
     if (!a) {
       say((string)RED "couldn't write " + nlf + POP);
Only in escape-src: upper.cc.orig