infinite vertical lines not so vertical

Ever since upgrading to 2008 (sp0.1) I have noticed someweird behavior when creating lines of infinite length. When theline is created and set coincident to the origin then sethorizontal or vertical it is still possible to grab the line andspin it around the origin thus creating an unsolvable condition(see attached) is this a bug or is there some setting somewherethat governs the behavior of infinite lines? This does not occurwhen using lines of finite length even if the line does not havedefined endpoint locations. Selecting fixed does solve this issuehowever I don't remember having to do this in 2007.SolidworksSketching