remove update speculation as it can create blind updates
remove update speculation as it can create blind updates

darcs-hash:20070602005802-1a7c6-0476d3a07a7aeac138c45e001141c5fa8f8c3de4

kirbyfan64/jhc,kirbyfan64/jhc,kirbyfan64/jhc,kirbyfan64/jhc