diff --git a/NEWS b/NEWS
index 4bb218e9..fb2e4cc8 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,7 @@ What's new in psycopg 2.4.4
 ---------------------------
 
   - Named DictCursor/RealDictCursor honour itersize (ticket #80).
+  - Fixed rollback on error on Zope (ticket #73).
 
 
 What's new in psycopg 2.4.3
diff --git a/ZPsycopgDA/db.py b/ZPsycopgDA/db.py
index fe27931c..2d85b21d 100644
--- a/ZPsycopgDA/db.py
+++ b/ZPsycopgDA/db.py
@@ -47,12 +47,15 @@ class DB(TM, dbi_db.DB):
         self.calls = 0
         self.make_mappings()
                         
-    def getconn(self, create=True):
+    def getconn(self, init=True):
+        # if init is False we are trying to get hold on an already existing
+        # connection, so we avoid to (re)initialize it risking errors.
         conn = pool.getconn(self.dsn)
-        conn.set_isolation_level(int(self.tilevel))
-        conn.set_client_encoding(self.encoding)
-        for tc in self.typecasts:
-            register_type(tc, conn)
+        if init:
+            conn.set_isolation_level(int(self.tilevel))
+            conn.set_client_encoding(self.encoding)
+            for tc in self.typecasts:
+                register_type(tc, conn)
         return conn
 
     def putconn(self, close=False):