Description of problem:

When screen is surrounded by paras, the horizontal spacing after screen is smaller than the one before screen.

Version-Release number of selected component (if applicable):
~]$ rpm -q publican
publican-2.7-1.fc15.noarch

How reproducible:
Always.

Steps to Reproduce:
1. Build a document with the following:

<para>
Blah blah blah blue blue blue red red red
</para>
<screen>
command 1; command 2; command 3;
command 3; command 5; command 6;
</screen>
<para>
Blah blah blah blue blue blue red red red
</para>

2. Open and view the screen portion.
  
Actual results:

The horizontal space between the first para and screen is larger than the horizontal space between screen and the second para.

Expected results:

The horizontal spaces should be of equal size. Right now, this can be achieved by including an empty para after screen:

<para>
Blah blah blah blue blue blue red red red
</para>
<screen>
command 1; command 2; command 3;
command 3; command 5; command 6;
</screen>
<para>
</para>
<para>
Blah blah blah blue blue blue red red red
</para>

However, that's an ugly hack and should not be used :)

Additional info:
As far as I know, this also applies to programlisting.