Oh whoops.

That's what I get for updating the software on 0 hours sleep. That's likely responsible for both issues.
I left a debug line of code in there. I have commented it out and re-uploaded the file. Same version number, please re-import the new version above OR you can manually delete the 1 line....
In the plugin
All Topic Forumdisplay Thread Count find the line:
PHP Code:
echo $alltopics ;
and erase it.