If you get "
invalid torrent file" error while adding torrent into your client, solution is to clean your browser cache.
Internet Explorer users :-Tools --> Internet Options
Delete cookies , Delete Files and Clear History
This is also explained in image shown below :-

Firefox users :-
Tools -> Clear Private Data (Or use keyboard shortcut :- Ctrl + Shift + Del )
Check Box in front of following and press 'Clear Private Data Now'.
- Browser History
- Cache
- Cookies
This is also explained in image shown below :-
