1.

When generating PostScript to show strings, '(' and ')' may need to be escaped. 
These characters are now escaped when the JOB string is shown.

2.

Manually deleting samples from a .hp file now does what you would expect.

3.

The -t flag for setting the threshold percentage has been scrapped. No one
ever used it.

4.

Long JOB strings cause hp2ps to use a big title box. Big and small boxes
can be forced with -b and -s flag. 

5.

MARKS now print as small triangles which remain below the x axis.

6. 

There is an updated manual page.

7.

-m flag for setting maximum no of bands (default 20, cant be more than 20).
-t flag for setting threshold (between 0% and 5%, default 1%).

8.

Axes scaling rounding errors removed.