Some lines in the .htaccess file had to be commented out for the forum to display at all.
A lot of the time overrides exist in the .htaccess that affect the web server itself which would have to be adjusted when moving to a new environment. FYI, threads does not ship with a .htaccess file nor is one a requirement for utilizing the product.
Main Forum now displays, but there is no left column (with islands).
Delete everything in /cache and /templates/compiled, with the exception of the index files, then login to your forum and use the "clear cache" feature which will rebuild everything.
There is nothing listed under Active Topics/Active Posts tab and no error shown.
Could be the above issue.
I'm not really sure on the last one
