[texhax] Dirty lines when printing pdf

[Stephane Fombonne]

I'm using Latex on Debian (standard Sarge install), and everything run fines
after compiling with pdflatex except the following: I have a neat pdf look
when I view it with a pdf-reader. However, the printed output contains
several lines that are a bold and blurr (dirty feeling). They appear here and
there, though not very often.

Did you experience such a failure mode ? What's wrong with the preamble ?  I
really can't find a way yo solve this problem.

Thanks for you help!

NB: my preamble is this:
\documentclass[10pt]{article}     
\usepackage[T1]{fontenc}
\usepackage[latin1]{inputenc}
\usepackage{times}
\usepackage[frenchb]{babel}
\usepackage{geometry}
\geometry{hmargin=3.0cm,vmargin=1.5cm}

Stephane.