I did a manual upgrade to 2.0.20, and this mod is the only thing that isn't working correctly for me now. Topic descriptions no longer display anywhere, except in the text box when creating or editing a post. In other words, I can put in a Description while creating a new post. When I edit the post, I can see it again. But it isn't showing on either the index_body or the viewtopic pages.
When I view the source of the page where it should be displaying but isn't, the <span> for it is there--it's like there's a breakdown between the page and the function that populates the value. But if I set it to the first 255 characters of the post, or to a username link, that works.
I've tried disabling then re-enabling it to no avail.
Oh, here's something weird. When I first did the upgrade, the descriptions were visible. I attempted to post a reply to a topic and got kicked back to the community's index page. I went back in, descriptions were visible, I was again kicked out after clicking Reply. Tried a third time, descriptions NOT visible, reply function worked.

Since then, they've continued not working.
Ideas? Thanks so much for any help!
Edited to add: The "something weird" paragraph recreates itself everytime I close and re-open my browser. I've been using Firefox, but switched to IE and was able to reply successfully with Descriptions visible. However, after the reply was posted, Descriptions were gone.