groff lp4 post processor problems

[michael lindenmeyer]

In my recent attempts to use groff 1.20.1 and the lj4 post processor, I 
have encountered a number of instances where certain character pairs 
(ff, fi, fl, ') are passed on to the hp printer as escape sequences that 
print as (1/2,¡,«, Æ). I discovered that (ff, fi, fl) are actually 
transferred to the printer as escape sequences, (\xab, \xad, \xae) and 
suspect a similar code for '. This leads me to believe that the lp4 post 
processor may have a problem. Can someone explore this and provide a 
solution?

Thanks.
Michael E. Lindenmeyer
address@hidden
110217.1337