Adding vertical rule into tabu

Question

Community, :)

I know it might sound like some noobish' question, but I have some trouble adding the last vertical rule into my tabu. I've retrieved the code from here: How to Create Comparison Tables in LaTeX?

I am using the code from user mrf, without using the TikZ package. I extended his example with more columns. So my code looks like this:

\begin{table}[h]
\taburowcolors[2]{white .. black!20}
\sffamily\footnotesize
\tabulinesep=6pt
\begin{tabu}{|>{\cellcolor{black!60}\color{white}}r | X[cm] | X[cm]| X[cm] | X[cm] |}
\hline
\rowcolor{black!80}\strut  & \color{white}Enterprise SAN & \color{white}ioDrive &      \color{white}test & \color{white}test2\\
Form Factor & Rack Applicance (40U $\times$ 20") & Low Profile PCIe & test & test2\\
Interface & FC-4 & PCIe x4 & test & test2\\
Drive Units & 150$\times$15 RPM disks & 2$\times$80gig & test & test2\\
\hline
\end{tabu}
\caption{Test.}
\label{tab:test}
\end{table}

The problem is as soon as I extend the example from the link, there is a vertical rule missing in the table:

.. and I just cant find out why. If I define the beginning like this:

\begin{tabu}{|>{\cellcolor{black!60}\color{white}}r | X[cm] | X[cm]| X[cm] | X[cm] }

(Notice the missing | at the end) The line appears but therefore the vertical rule at the end of the table is missing. Does anyone know why this is happening?

EDIT: KarlKoeller showed me that TexMaker is showing me in the preview the screenshot above, but with Adobe Reader its the opposite: The missing vertical line is there, but the others are missing then...

Any Help is appreciated!

Answer 1

This is an issue with the PDF viewer.

I get no problems with SumatraPDF, while with Adobe Reader I have to zoom in to see all the vertical lines.

One way to circumvent it, is to increase the thickness of the lines, e.g. issue

\arrayrulewidth=1pt

In this way you should be able to see all vertical lines with every PDF viewer.

Complete example

\documentclass{article}

\usepackage{tabu,xcolor,colortbl}

\begin{document}

\begin{table}[h]
\taburowcolors[2]{white .. black!20}
\sffamily\footnotesize
\tabulinesep=6pt
\arrayrulewidth=1pt
\begin{tabu}{|>{\cellcolor{black!60}\color{white}}r | X[cm] | X[cm]| X[cm] | X[cm] |}
\hline
\rowcolor{black!80}\strut  & \color{white}Enterprise SAN & \color{white}ioDrive &      \color{white}test & \color{white}test2\\
Form Factor & Rack Applicance (40U $\times$ 20") & Low Profile PCIe & test & test2\\
Interface & FC-4 & PCIe x4 & test & test2\\
Drive Units & 150$\times$15 RPM disks & 2$\times$80gig & test & test2\\
\hline
\end{tabu}
\caption{Test.}
\label{tab:test}
\end{table}

\end{document} 

Output (SumatraPDF):