Google search Toolbar when you click a search word already in the drop box, nothing happens.

With the last version of FF when the search box gave me drop down suggestions & clicked on one the browser gave me near matches. With this new version any selected from the drop down has no effect and does not launch near matches in the browser. The half entered search word is still showing in the search box. Search for halfords type halfo in search box Dropdown shows many possibilities of halfo...... I click on halfords Nothing happens and halfo is still showing in the search box and the dropdown is blank. Windows XP SP3 Home. FF4 just installed. I hope you made sense of the above!