Changing it now is your call, but to be accurate in your assessment you might consider analyzing the logs to see how many visitors you get, how many pages on average they look at, and finally how many new visitors sign up. If you're happy with the average stay, you could conclude they aren't bothered by having the registration in front of them all the time. If you find you have a lot of "bounces", you then may want to consider putting it on the home page alone. It's up to you to decide how to drive change. I am sure the user's experience will be improved by shifting the registration around, so moving it for a few days can't hurt. Good luck with it.