Error adding attachments smaller than 1001 bytes

[azriphale@…]

When adding attachments smaller than 1kB in Trac 0.10.3, an error is produced. It is reliably reproducable when trying to attach a file 1000 bytes or smaller.

Python Traceback

Traceback (most recent call last):
  File "/var/lib/python-support/python2.5/trac/web/main.py", line 387, in dispatch_request
    dispatcher.dispatch(req)
  File "/var/lib/python-support/python2.5/trac/web/main.py", line 237, in dispatch
    resp = chosen_handler.process_request(req)
  File "/var/lib/python-support/python2.5/trac/attachment.py", line 361, in process_request
    self._do_save(req, attachment)
  File "/var/lib/python-support/python2.5/trac/attachment.py", line 450, in _do_save
    size = upload.file.len
AttributeError: 'cStringIO.StringO' object has no attribute 'len'

[anonymous]

Appears to be a Duplicate of #4311 Sorry...