The right scroll bar is missing on the on the preview window when any of the
address lines are longer than the width of the window.
The same problem can be shown when opening e-mail in it's own window, and
resizing the window to be narrower than the addresses.
Mozilla/5.0 (X11; U; OpenVMS COMPAQ_AlphaServer_DS10_466_MHz; en-US; rv:1.1)
This is already reported in bug 154544 to name one of many.
*** This bug has been marked as a duplicate of 91662 ***
marking verified as a duplicate