Headset wobble?

The subject of this post is probably a bit misleading. I recently got a new fork (thanks all for helping me to decide on the Revelation - it looks awesome
), and decided to replace the headset at the same time - I now have a Cane Creek S-8. Before any replacements, I could hold the front brake and rock the bike back and forth, and I could detect some small wobble between the top cup of the headset and the steerer tube. Now with a brand new headset I can detect something similar. Is this anything to worry about? I can't really think what is causing it - new cups, new bearings, new fork. The LBS fitted everything (they did it really cheap!).
Thanks for any suggestions,

Thanks for any suggestions,
0
Posts
have a read of the threadless headset info on park tools.
Parktools :?:SheldonBrown