HTML email - gaps between images in Outlook 2013

Question

I'm composing an HTML email which looks fine in every major email client except Outlook 2013, which is adding vertical gaps between my image slices. I unfortunately don't have Outlook 2013 installed on my computer so it's making it hard to test, but a screenshot from my client suggests that it looks like this -

My code is available here - HTML version.

I have no idea what more I can do to get rid of the gaps - I've set line-height for the tds and images to zero, I've set the images to display: block, I've set the tables to border 0, cellpadding and cellspacing zero, and border-collapse: collapse. What else can I do to fix it?

Edited to add - I'm actually not sure if the gaps are between images or table rows. From the screenshot it actually looks like it might be the table rows.

Answer 1

Problem solved - changing the line-height of the tds containing the images to the height of the image, rather than 0, resolves the gaps and doesn't break the layout in other clients. So

    <td width="150" style="line-height: 83px;">
       <img src="" height="83px">
    </td>