Were BHW SERPs affected when it moved from vB to XF? I'm guessing since URLs change and other things too, there may be (negative) effect on the SERPs of a site if you move from vB to XF. Is that the case? I am trying to move a client's site from vB to XF but we want to make sure that this move won't cause any negative affects on the SERPs and how to ensure that it doesn't. Any tips/advices will be appreciated.