I've seen the game twice now and paid particular attention to that pass from AAC (Adam Ashley-Cooper) to Crawford and I cannot see the forward pass in which you are referring. The ball travels backwards.
Just to clear it up. Here's a link to some highlights. http://www.pakiscorner.com/ The pass in question occurs in around 25 seconds in and you get a pretty good overview of it at the 54 second mark which illustrates it was perfectly fine.
It's the second try people are referring to; the pass from Horne to Crawford. It's at about 8:25 in the video.
I think it is very much line ball. Not definitely forward. If you watch carefully, Horne gets his hands quite far in front of him and I think you could easily make a case that the pass was flat.
I certainly don't think it was a blatant forward pass and possibly wouldn't get called back by the TMO if the whole sequence was reviewed. That pass is never likely to get called back in a live setting as the referee and touch judge are never going to be square enough to make a proper judgement.