Windows 7 Folder Tree Expansion Causing Explorer To Jump Down

I have just upgraded to Windows 7 and have discovered an annoyance with Windows Explorer. When I expand a folder's contents (tree) by clicking on the arrow icon, the entire contents of the left panel jump to the bottom of the visible screen (rather than just the subfolders expanding). The annoyance is that every time I expand a tree in the Explorer, I also have to scroll the contents of the left panel back up (because it jumped down). For example, in Vista, if I expanded a folder tree, only the sub folders would expand and move downward.