I believe the bug is the one described here: https://bugs.launchpad.net/mahara/+bug/1266586
Yes this is a known bug and I've added a fix for this to the master branch of mahara (as part of another patch).
I will look at getting the relevant bits from that patch and backport to fix for version 1.9 also.
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<div style="float: left; padding: 3px; height: 8px;" class="thumb">
<a rel="lightbox_99309" href="https://portfolio.gla.ac.uk/artefact/file/download.php?file=157780&view=21778&maxwidth=1024" title="" target="_blank">
<img src="https://portfolio.gla.ac.uk/artefact/file/download.php?file=157780&view=21778&maxwidth=250" alt="" title="" class="frame">
</a>
</div>
...(note the 8px height in the enclosing div).
Once again, this seems to have happened since an upgrade from 1.6 to 1.9. Any thoughts appreciated.
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