Just few more clicks... :-)
'Right Click' on the toolbar
Select 'Customize'
Select 'Commands' tab
Select 'Toolbar' option button
Select your toolbar from the combo box
Click 'Reset All'
This should do it.
Also all your settings files are stored in
'CurrentSettings.vsssettings'
file, at following location
<br />
C:\Users\<your user="" name="">\Documents\Visual Studio 2008\Settings</your>
try removing that file, I think you reinstall the Visual Studio but the file was already there, so it read it again.