Neil,
Are you running one of these?
http://www.golfmk6.com/forums/showthread.php?t=60585
I do like their you tube video
Yes great video
I was looking at that the other day on the apr site, it's something that I've always known about, and touch wood never had any major issues, I always keep a close check on oil levels because of this,
The recent issue I had with the white smoke on track were I thought I had blown my turbo was due to the PCV failure and pumping oil into the intake system, I've since fitted the catch can and now all seems ok, I emptied my catch can the day as it was full of what looked like muddy water
so at least that has stopped all that crap going back through the engines intake system, (can fills a lot quicker than I thought it would)
Think I'm gonna fit an oil pressure gauge and keep an eye on things tho,