I use Mathematica v9.0.1 Home Edition. I recently modified some code to take advantage of the ListPicker Manipulate control (new in v9). I notice when I use it within .nb it highlights the row of above the selected rows. Yet, when I export to CDF, it works fine.
It only occurs when the WindowToolbars->{"RulerBar"} is set (select Show Ruler under the Windows tab).
The code I use is:
edgeVals = {{"All", 6}};
edgeList = {{2, 5}, {Sqrt[6], 1}, {"All", 6}};
(* Edge Animations *)
Row@{" Norm'd edges {value,count}: ",
Dynamic@ListPicker[Dynamic@edgeVals, edgeList],
Dynamic@Column@edgeVals}
Screenshot of the Manipulate session in a .nb notebook:
Screenshot from a CDF browser session:

