Attach File doesn't work!

[anonymous]

Traceback (most recent call last):

  File "C:\Python23\lib\site-packages\trac\web\modpython_frontend.py", line 206, in handler
    dispatch_request(mpr.path_info, mpr, env)
  File "C:\Python23\Lib\site-packages\trac\web\main.py", line 139, in dispatch_request
    dispatcher.dispatch(req)
  File "C:\Python23\Lib\site-packages\trac\web\main.py", line 107, in dispatch
    resp = chosen_handler.process_request(req)
  File "C:\Python23\Lib\site-packages\trac\attachment.py", line 267, in process_request
    self._do_save(req, attachment)
  File "C:\Python23\Lib\site-packages\trac\attachment.py", line 298, in _do_save
    if not upload.filename:
AttributeError: 'StringField' object has no attribute 'filename'

[cboos]

Duplicate of #554. See TracModPython#Win32Issues for a solution to this known issue.

P.S. a search for 'StringField' object has no attribute either on Trac or on Google (even with I'm feeling lucky :) ) would have shown an appropriate answer...