Thanks for the replies gentlemen, this is very strange.

My stats went down from 230GH/s to 170GH/s and have remained at that level for 36 hours now, whereas the other half of my hash power going to slush has remained constant, as has the S3 itself which is sitting at 465GH/s. I could understand if the Slush stats had gone up (compensation for low BTC Guild) or down (AntMiner/connection issue) but since everything else remains the same, I am (easily) confused

http://www.hpmuirt.com/images/temp/BTC%20Guild%2072%20hours.JPG

I have switched over to the EU server and will see what happens.

Cheers n beers

HPmuirt