In my email, there is a right-aligned image. And the problem is, its right side does not exactly stick to the right edge of parent table cell, in stead, there is a 1px gap. That only happens on Outlook 2007, 2010, and 2013, not on other versions of Outlook and other email agents.

Please copy the code at here and send it to Outlook 2007, 2010, or 2013 to see the problem.

I had tried many solutions such as border-collapes, mso-table-rspace, mso-line-height-rule, etc, and still had no luck.