If you have pan-0.117, please try the following.
1. Switch the layout view to Tabbed. Pressing 'z' does this.
2. Get headers in some group.
3. Double click on an article to read its contents.
4. Expand the Subject line by, clicking on the little rightward
facing triangle
to the left of the subject. The triangle should now face down and
their should now be subject, from, date, and newsgroup information
now visible.
5. Now press '2' to switch back to the header pane view.
Is your horizontal scroll bar now in the middle with most of the
headers off to the left of the screen? i.e the headers pane is not
left justified?
If so, please click on the triangle to "collapse" the subject
information, i.e
triangle facing rightwards, and repeat with another article.
It seems on my pan if the triangle is down, and I switch to the
header's pane the header pane is centered not left justified.