It is known problem from previous version, many coders have tried to fix it from v2.0.5 and beyond. Hope it will be resolved on this version.
Just installed script and there were no problems, except for the last two lines on check.php
Default Theme: Invalid. (Not a number)
Default Language: Invalid. (Not a number)
Problem report:
Create folder in:
cache/get_row_count
cache/queries
Upload my first torrent
will return a little later with more details
Have a nice day M8