I found the problem at least with my site.
The culprit is the "add this link to Digg" section in your link_summary.tpl file. The code has a truncated version of the body text ready to send to Digg. If the story gets cut off in the middle of an HTML container, viola - open HTML tag to hose the rest of your page up.
I'm sure there's a way to strip tags before sending to Digg. If anyone knows how please post.
Here's a quick fix: (It won't auto fill the Digg story this way just the title)
Line 230 in the link_summary.tpl
Code:
<a title="submit '{$title_short}' to digg" href="http://digg.com/submit?phase=2&url={$enc_url}&title={$title_short}&bodytext={$story_content}"><img src="{$my_base_url}{$my_pligg_base}/templates/{$the_template}/images/digg.png" border="0" alt="submit '{$title_short}' to digg" /></a> replace with:
Code:
<a title="submit '{$title_short}' to digg" href="http://digg.com/submit?phase=2&url={$enc_url}&title={$title_short}"><img src="{$my_base_url}{$my_pligg_base}/templates/{$the_template}/images/digg.png" border="0" alt="submit '{$title_short}' to digg" /></a> &bodytext={$story_content} was removed.
If anyone knows how to fix this with full functionality please let us know.