CSS/Webkit: Background Images for Table Row

it's bit late but, you can use "background-attachment : fixed" to solve this problem.

<table>
  <tr class="bg">
    <td></td>
    <td></td>
  </tr>
</table>

and in CSS

tr.bg {
    background-image : url(../PathToLeftBackground.png) repeat-y 50px 0px;
    background-attachment: fixed;
}

and it works!

By default, the TR and TD have display properties table-cell and table-row. We need them to forget about it and feel like simple block elements:

tr {display: block;}
td {display: inline-block; background: transparent;}

This code solved the problem of rendering for me.

Will your table always only have 2 rows? Such as:

<table>
  <tr>
    <td></td>
    <td></td>
  </tr>
</table>

If so, a simple but not overly elegant solution would be to split your background image into two images, and apply a CSS class to the left and right column, applying half of the arrow to the right side of the left column, and to the left side of the right column:

<table>
  <tr>
    <td class="left"></td>
    <td class="right"></td>
  </tr>
</table>

Your CSS could then be similar to:

td.left
{
  background: #ffffff url(../PathToLeftBackground.png) top right;
}
td.right
{
  background: #fffff url(../PathToRightBackground.png) top left;
}

You could also use a sprite image where you use 1 image and position it differently for the two backgrounds.

I realize it's probably not the most ideal solution but it would at least fix your issue and get your project moving. I sometimes use simple solutions such as this in order to make forward progress, and then revisit the problem to make it more efficient later.

Hope this helps!