The downside to linking with images here, is that there is a weird jump that affects the post concerned when doing this.
Indeed. You may, if you're allowed to code in straight html, be able to not just use the title attribute, but also the target one, as you've used but also include border="0". If that doesn't work, perhaps overriding some CSS might work, too? That is, to specify:
Code: html
- img style="border: 0;"
.. and so forth ..