When using Gnome's Midnight Commander file manager, and you double-click
on any file (like .html) that is associated with netscape, the file will get loaded
into netscape, but an error will be displayed:

  Netscape: Error:
    could not fdopen() the new stderr: Invalid argument

I'm pretty sure this is a bug in 'mc' since you can do the following from an xterm:

  $ netscape  file.html &

And no errors will appear.