Assuming you have IE6 where this problem occurs (not Mozilla or Windows Explorer):

- View/Toolbars, then check if Lock Toolbars is checked. If so, uncheck it, so they are unlocked (I hope I use the right terms, don't have the English version here).
- There is/appears a small vertical bar on the left side of each toolbar (left from the text 'Address').
- Leftclick on the bar next to 'Address' and drag it to where-ever you want.
- If you like so, lock the toolbars again.