AttributeError: StringIO instance has no attribute 'name'

[jaap3]

When I run collectstatic and use 'PrecompressedStaticFilesStorage' or the 'CachedPrecompressedStaticFilesStorage' I get the following traceback:

Traceback (most recent call last):
  File "manage.py", line 54, in <module>
    sys.exit(django.core.management.execute_from_command_line())
  File "Django-1.4.5-py2.7.egg/django/core/management/__init__.py", line 443, in execute_from_command_line
    utility.execute()
  File "Django-1.4.5-py2.7.egg/django/core/management/__init__.py", line 382, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "Django-1.4.5-py2.7.egg/django/core/management/base.py", line 196, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "Django-1.4.5-py2.7.egg/django/core/management/base.py", line 232, in execute
    output = self.handle(*args, **options)
  File "Django-1.4.5-py2.7.egg/django/core/management/base.py", line 371, in handle
    return self.handle_noargs(**options)
  File "Django-1.4.5-py2.7.egg/django/contrib/staticfiles/management/commands/collectstatic.py", line 163, in handle_noargs
    collected = self.collect()
  File "Django-1.4.5-py2.7.egg/django/contrib/staticfiles/management/commands/collectstatic.py", line 120, in collect
    for original_path, processed_path, processed in processor:
  File "django_precompressed-0.0.2-py2.7.egg/precompressed/storage/base.py", line 160, in post_process
    saved_name = self._save(gzipped_name, gzipped_file)
  File "Django-1.4.5-py2.7.egg/django/core/files/storage.py", line 195, in _save
    for chunk in content.chunks():
  File "Django-1.4.5-py2.7.egg/django/core/files/base.py", line 65, in chunks
    counter = self.size
  File "Django-1.4.5-py2.7.egg/django/core/files/base.py", line 39, in _get_size
    elif os.path.exists(self.file.name):
AttributeError: StringIO instance has no attribute 'name'