This is  normal for folders in Vista. Read only has no meaning for folders.
Notice the box is not checked but just shaded.

Sorry wrong news group.

Then don't bother  trying to change the "Read-only" box in the Folder
properties dialog. It doesn't mean what you think it means, and it
doesn't do what you think it does. First it only indicates what will
happen to the files INSIDE the folder in question IF you change the box
 AND hit apply or ok. That is it's sole purpose and indicating
properties. It will ALWAYS appear as gray and checked when you open
Folder properties, and it means NOTHING will be changed if you click OK.

Are you talking about read-only on a directory?

There is no read-only attribute for a directory. What you're seeing is
a shortcut to allow you to set or clear the attribute for all files in
the directory.

Each time you display this tab of the properties dialog, you're
looking at a 3-state box in its third state: neither set nor unset. On
my computer that shows as a green blob in the box. Click it once, and
the box is empty, that's the NO state. Click it again and a check
appears, that's the YES state. If you click OK or Apply when the box
is in the YES or NO state, the read-only attribute is set or cleared
(depending on whether you're in YES or NO state) for EVERY file in the
directory. But when you bring the box up again, you will again see it
in the third state.

If you bring up the same box for the individual files, you'll see the
result of what you've done.