When I create a sub forum and then click into the parent, I see the error below:

Fatal error: Call to undefined function sf_filer_title_display() in /problem-with-post-edit-buttonome/problem-with-post-edit-buttonhem/public_html/scn2/wp-content/plugins/simple-press/forum/content/sp-forum-view-class.php on line 276

ah, that should be filter, not filer...  fixed and committed...  we have not done much with subforums at this point...  so feed any other issues back here...

What file should I upload?

After the latest update I still her an error with Child Forums:

Fatal error: Call to undefined function sf_filter_title_display() in /problem-with-post-edit-buttonome/problem-with-post-edit-buttonhem/public_html/scn2/wp-content/plugins/simple-press/forum/content/sp-forum-view-class.php on line 276

wow. two typos in the same function call... I only fixed one... just fixed and committed the second fix... just svn up again, please...