diff --git a/rq/job.py b/rq/job.py
index 8b20474..da57e1d 100644
--- a/rq/job.py
+++ b/rq/job.py
@@ -75,11 +75,10 @@ def get_current_job(connection=None, job_class=None):
     """Returns the Job instance that is currently being executed.  If this
     function is invoked from outside a job context, None is returned.
     """
-    job_class = job_class or Job
-    job_id = _job_stack.top
-    if job_id is None:
-        return None
-    return job_class.fetch(job_id, connection=connection)
+    if job_class:
+        warnings.warn("job_class argument for get_current_job is deprecated.",
+                      DeprecationWarning)
+    return _job_stack.top
 
 
 class Job(object):
@@ -479,18 +478,18 @@ class Job(object):
 
     def save(self, pipeline=None, include_meta=True):
         """
-        Persists the current job instance to its corresponding Redis key.
+        Dumps the current job instance to its corresponding Redis key.
 
-        Exclude persisting the `meta` dictionary by setting
+        Exclude saving the `meta` dictionary by setting
         `include_meta=False`. This is useful to prevent clobbering
         user metadata without an expensive `refresh()` call first.
 
+        Redis key persistence may be altered by `cleanup()` method.
         """
         key = self.key
         connection = pipeline if pipeline is not None else self.connection
 
         connection.hmset(key, self.to_dict(include_meta=include_meta))
-        self.cleanup(self.ttl, pipeline=connection)
 
     def save_meta(self):
         """Stores job meta from the job instance to the corresponding Redis key."""
@@ -548,17 +547,15 @@ class Job(object):
         connection.delete(self.key)
         connection.delete(self.dependents_key)
 
-
     # Job execution
     def perform(self):  # noqa
         """Invokes the job function with the job arguments."""
         self.connection.persist(self.key)
-        self.ttl = -1
-        _job_stack.push(self.id)
+        _job_stack.push(self)
         try:
             self._result = self._execute()
         finally:
-            assert self.id == _job_stack.pop()
+            assert self is _job_stack.pop()
         return self._result
 
     def _execute(self):
diff --git a/rq/queue.py b/rq/queue.py
index cbef351..e4b6a47 100644
--- a/rq/queue.py
+++ b/rq/queue.py
@@ -225,6 +225,7 @@ class Queue(object):
                             job.set_status(JobStatus.DEFERRED)
                             job.register_dependency(pipeline=pipe)
                             job.save(pipeline=pipe)
+                            job.cleanup(ttl=job.ttl, pipeline=pipe)
                             pipe.execute()
                             return job
                         break
@@ -298,6 +299,7 @@ class Queue(object):
         if job.timeout is None:
             job.timeout = self.DEFAULT_TIMEOUT
         job.save(pipeline=pipe)
+        job.cleanup(ttl=job.ttl, pipeline=pipe)
 
         if self._async:
             self.push_job_id(job.id, pipeline=pipe, at_front=at_front)
@@ -494,6 +496,7 @@ class FailedQueue(Queue):
             job.ended_at = utcnow()
             job.exc_info = exc_info
             job.save(pipeline=pipeline, include_meta=False)
+            job.cleanup(ttl=-1, pipeline=pipeline)  # failed job won't expire
 
             self.push_job_id(job.id, pipeline=pipeline)
             pipeline.execute()
diff --git a/rq/registry.py b/rq/registry.py
index 168dd8e..51e6dd0 100644
--- a/rq/registry.py
+++ b/rq/registry.py
@@ -93,6 +93,7 @@ class StartedJobRegistry(BaseRegistry):
                                                    connection=self.connection)
                         job.set_status(JobStatus.FAILED)
                         job.save(pipeline=pipeline, include_meta=False)
+                        job.cleanup(ttl=-1, pipeline=pipeline)
                         failed_queue.push_job_id(job_id, pipeline=pipeline)
                     except NoSuchJobError:
                         pass
diff --git a/tests/test_job.py b/tests/test_job.py
index 1491f7f..46d7d39 100644
--- a/tests/test_job.py
+++ b/tests/test_job.py
@@ -386,7 +386,7 @@ class TestJob(RQTestCase):
         self.assertEqual(job.get_ttl(), ttl)
         job.save()
         job.perform()
-        self.assertEqual(job.get_ttl(), -1)
+        self.assertEqual(job.get_ttl(), ttl)
         self.assertTrue(job.exists(job.id))
         self.assertEqual(job.result, 'Done sleeping...')
 
diff --git a/tests/test_queue.py b/tests/test_queue.py
index 294fb62..7129452 100644
--- a/tests/test_queue.py
+++ b/tests/test_queue.py
@@ -650,3 +650,16 @@ class TestFailedQueue(RQTestCase):
 
         job.delete()
         self.assertFalse(job.id in failed_queue.get_job_ids())
+
+    def test_job_in_failed_queue_persists(self):
+        """Make sure failed job key does not expire"""
+        q = Queue('foo')
+        job = q.enqueue(div_by_zero, args=(1,), ttl=5)
+        self.assertEqual(self.testconn.ttl(job.key), 5) 
+
+        self.assertRaises(ZeroDivisionError, job.perform)
+        job.set_status(JobStatus.FAILED)
+        failed_queue = get_failed_queue()
+        failed_queue.quarantine(job, Exception('Some fake error'))
+        
+        self.assertEqual(self.testconn.ttl(job.key), -1)