Whenever I view our emails in Gmail on Chrome or Safari, the first and third social icons in the table row (four icons total) do not display. However they do display just fine in Firefox, and I cannot reproduct the issue on my colleagues' computers under similar conditions. I'm using OS 10.10.5 Yosemite, and all my browsers are set to auto-update. Has anyone else experienced this issue?

Screenshot
`<!--social-->
    <td align="center" style="padding:10px 10px;" valign="top"><img alt="Thumbtack" src="https://static.cdn.responsys.net/i2/responsysimages/thumbtk/contentlibrary/masterfiles/logo_small.png" style="max-width:105px;" title="Thumbtack" width="105" />
                  <table border="0" cellpadding="0" cellspacing="0">
                     <tbody>
                        <tr>
                           <td align="center" style="padding-top:0px;" valign="top">
                           <table border="0" cellpadding="20" cellspacing="0">
                              <tbody>
                                 <tr>
                                    <td align="center" valign="top"><a href="${clickthrough('facebook')}" style="color:#ad1717; font-size:16px; line-height:22px; text-decoration:none"><img alt="Facebook" height="23" src="/contentlibrary/customer_marketing/20151113_winback_reengagement/holiday_newsletter/fb.png" title="Facebook" width="23" /></a></td>
                                    <td align="center" valign="top"><a href="${clickthrough('google_plus')}" style="color:#ad1717; font-size:16px; line-height:22px; text-decoration:none"><img alt="Google Plus" height="23" src="/contentlibrary/customer_marketing/20151113_winback_reengagement/holiday_newsletter/gp.png" title="Google Plus" width="23" /></a></td>
                                    <td align="center" valign="top"><a href="${clickthrough('twitter')}" style="color:#ad1717; font-size:16px; line-height:22px; text-decoration:none"><img alt="Twitter" height="23" src="/contentlibrary/customer_marketing/20151113_winback_reengagement/holiday_newsletter/tw.png" title="Twitter" width="23" /></a></td>
                                    <td align="center" valign="top"><a href="${clickthrough('pinterest')}" style="color:#ad1717; font-size:16px; line-height:22px; text-decoration:none"><img alt="Pinterest" height="23" src="/contentlibrary/customer_marketing/20151113_winback_reengagement/holiday_newsletter/pin.png" title="Pinterest" width="23" /></a></td>
                                 </tr>
                              </tbody>
                           </table>
                           </td>
                        </tr>
                        <tr>
                           <td align="center" style="font-size:12px; color:#666666; font-family:'Avenir Next Demi Bold', 'Avenir Next', 'Helvetica Neue', Helvetica, Arial, sans-serif; padding:20px 20px;font-weight:400;line-height:125%;text-align:center;" valign="top"><a href="${clickthrough('blog')}" style="font-size:12px; color:#666666; font-family:'Avenir Next Demi Bold', 'Avenir Next', 'Helvetica Neue', Helvetica, Arial, sans-serif; text-decoration:none; text-transform:uppercase;">OUR BLOG</a> | <a href="${clickthrough('login')}" style="font-size:12px; color:#666666; font-family:'Avenir Next Demi Bold', 'Avenir Next', 'Helvetica Neue', Helvetica, Arial, sans-serif; text-decoration:none; text-transform:uppercase;">MY&nbsp;ACCOUNT</a></td>
                        </tr>
                     </tbody>
                  </table>
                  </td>
               </tr>
               <!--/social-->