dirtree Template Formatting Changed

I've integrated dirtree package into a LaTeX document I am working on, but it appears to be interfering with the document format (see image here 1). How do I tell LaTeX to maintain original formatting after dirtree?

\documentclass{article}

\usepackage{dirtree}
\usepackage[parfill]{parskip}

\begin{document}

This is just a test.

\begin{itemize}
\item This is a test 1
\item This is a test 2
\item This is a test 3
\end{itemize}

\dirtree{%
.1 \framebox{\textbf{NDLTD}}.
.2 GATECH.
.2 \framebox{\textbf{OCLC}}.
}

\begin{itemize}
\item This is a test 1
\item This is a test 2
\item This is a test 3
\end{itemize}

\end{document}


Update #1
I just discovered, while preparing a minimum working example, that the problem is as a result of loading the parskip package.

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Welcome to TeX.sx! Please add a minimal working example (MWE) that illustrates your problem. It will be much easier for us to reproduce your situation and find out what the issue is when we see compilable code, starting with \documentclass{...} and ending with \end{document}. In my machine, I don't get a crammed output as you did. –  hpesoj626 Dec 23 '12 at 9:15
@hpesoj626 Thank you for this. Please see update #1 in original post. I believe the problem is as a result of using parskip package with parfill option. –  phiri Dec 23 '12 at 10:22
In version 0.2 try enclosing \dirtree{} with braces. –  hpesoj626 Dec 23 '12 at 10:56

looks like a problem with an old version of parskip or dirtreebecause I cannot see any problem. Put \listfiles into your preamble and compare the list which is at the end of the log file:

 *File List*
article.cls    2007/10/19 v1.4h Standard LaTeX document class
size10.clo    2007/10/19 v1.4h Standard LaTeX file (size option)
dirtree.sty    2012/12/11 v0.32 package wrapper for dirtree
dirtree.tex    2012/12/11 v0.32 dirtree' (jcc)
`