Originally Posted by AdultKing

Onsist have apologised and asked Google to re-instate the taken down links and this has already happened.

It does pay to be careful about companies sending a blanket DMCA for your whole site, otherwise you can suffer considerable loss as a result.

So, I'm glad Onsist have resolved the problem after I complained to them. However it's a good lesson for everyone - check your site against DMCAs or better yet have Google Webmaster Tools for all of your sites so you can easily pick up on these issues.