Problems printing to HP printers

I have problems when printing to HP printers for numbered, lettered, or bulleted paragraph types with a \t code.  I often get gaps in the text in the wrong places - best illustrated by example

a.  NanoPure (this one is ok - so it doesn't always happen)

b.MasterF   lex multichannel

d.Mi  dwest dental handpieces

...

g.Biosaf  ety Level I

The tab should be after the period in the letter or number.  This all have the same code - L:<a+>.\t and show up fine on the screen and show up fine in pdfs.  So it appears that there's an issue in the FM12 - HP printer protocols.  The print driver is new but it's happened over several HP printers and FM versions.

Help!!

David Stevens