Google workaround
If, like myself you liked to use the discussions filter to pull up just forums and news groups etc for the search results, here is a little workaround that will work for you.
After your search URL just append the following... &tbm=dsc
As an example, if I were searching for "Dog training" in Google, just conduct the search as normal. When the results are returned type &tbm=dsc at the end of the url and go.
https://www.google.co.uk/search?noj=...aining&tbm=dsc