Errors When Clicking On Files

["natan yellin" <aantny gmail com>]

Hello everyone,
Occasionally I get this error when clicking on a file:
Traceback (most recent call last):
  File "/home/natan/Code/od/checkout/bigboard/bigboard/stocks/files/FilesStock.py", line 391, in __on_file_activated
    file_slideout = FileSlideout(fobj)
  File "/home/natan/Code/od/checkout/bigboard/bigboard/stocks/files/FilesStock.py", line 322, in __init__
    pixbuf = get_menu_pixbuf(menu, size=24)        
  File "/home/natan/Code/od/checkout/bigboard/bigboard/stocks/files/FilesStock.py", line 251, in get_menu_pixbuf
    icon_name = re.sub(r'\.[a-z]+$','', menuentry.get_icon()) 
  File "/usr/lib/python2.5/re.py", line 142, in sub
    return _compile(pattern, 0).sub(repl, string, count)
TypeError: expected string or buffer