The first line is not corrupted for me: 
SOMEWHATLONGNAME(1)   User Contributed Perl Documentation  SOMEWHATLON
+GNAME(1)



NAME
          SomewhatLongName.pod - This is a test

SYNOPSIS
           This is the synopsis



perl v5.12.2                      2013-07-08               SOMEWHATLON
+GNAME(1)

[download]

You are using an old version of Perl. Perhaps the bug you are seeing has been fixed since.

perldoc converts the script name to all caps for me, too. I can't remember it ever behaving differently. On linux, even built-in commands, like ls show up in caps. Perl is consistent with that: 

man ls

LS(1)                            User Commands                        
+   LS(1)

NAME
       ls - list directory contents

SYNOPSIS
       ls [OPTION]... [FILE]...

DESCRIPTION
       List  information  about  the FILEs (the current directory by d
+efault).  Sort
       entries alphabetically if none of -cftuvSUX nor --sort.

[download]

In reply to Re: Long script names and POD by toolic
in thread Long script names and POD by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.