Was your sidebar open to to the tab with a completed-and-waiting-to-be-placed building visible, by any chance? That translucent overlay on the sidebar charge anim is a significant source of slowdown unless your sidebar is in system memory as opposed to vram.
Did you see my note 9611 (http:// bugs.renegadepr ojects. com/view. php?id= 1547#c9611) ?
Was your sidebar open to to the tab with a completed- and-waiting- to-be-placed building visible, by any chance? That translucent overlay on the sidebar charge anim is a significant source of slowdown unless your sidebar is in system memory as opposed to vram.