diff --git a/core/views_survex.py b/core/views_survex.py
index f6e692f..c7d980c 100644
--- a/core/views_survex.py
+++ b/core/views_survex.py
@@ -95,7 +95,7 @@ class SvxForm(forms.Form):
             if mbeginend.group(1) != mbeginend.group(2):
                 return "Error: mismatching beginend"
                 
-        fout = open(fname, "w")
+        fout = open(fname, "wb")
         res = fout.write(rcode.encode("latin1"))
         fout.close()
         return "SAVED"
@@ -109,7 +109,7 @@ class SvxForm(forms.Form):
         fin = open(settings.SURVEX_DATA + self.data['filename'] + ".log", "rb")
         log = fin.read()
         fin.close()
-        log = re.sub("(?s).*?(Survey contains)", "\\1", log)
+        log = re.sub(b"(?s).*?(Survey contains)", "\\1", log)
         return log
 
 
diff --git a/templates/svxfile.html b/templates/svxfile.html
index b92f067..527e13c 100644
--- a/templates/svxfile.html
+++ b/templates/svxfile.html
@@ -49,9 +49,9 @@ $(document).ready(function()
 <form id="codewikiform" action="" method="POST">{% csrf_token %}
     <div class="codeframebit">{{form.code}}</div>
     <div style="display:none">{{form.filename}} {{form.dirname}} {{form.datetime}} {{form.outputtype}}</div>
-    <input type="submit" name="diff" value="Diffy" />
-    <input type="submit" name="save" value="Save"/>
-    <input type="submit" name="process" value="Process" title="executes cavern"/>
+    <input type="submit" name="diff" value="Differences between edited and saved versions of this file" />
+    <input type="submit" name="save" value="Save this edited svx file"/>
+    <input type="submit" name="process" value="Run 'cavern' on this svx file" title="executes cavern"/>
 </form>
 
 <div id="difflistajax">