The new (as of around March 15th) Core Update Bundle (build 55) includes an updated Folders_g component. If you have tried to install the Folders_g component that came with the update bundle released on or around December 30th of last year you may have ran into issues with the install not working.
The issue revolved around new installations of the folders component not creating tables, etc. in the database. If you had previously installed folders and you simply upgraded you may have been fine. This only seemed to affect new installs.
Either way, grab the newest update bundle and hopefully we can put these issues behind us. So far, from what I’ve tried, it has worked much better.