Inaccurate Location Bar Drop-Down Menu
When I click on the small arrow to the right of the star in the location/URL bar of Firefox 5.0, a drop-down menu/list appears of various URLs that I have not recently visited, but ARE in my bookmarks. This is certainly not an accurate 'most visited' list or 'most recent' list - it seems to be a random mix. How do I go about resetting this or deleting the non-recently visited bookmarks? In addition, the URLs that feature in this drop-down list that are bookmarks, do NOT have a yellow star?
I have cleared my cookies and fiddled with my settings to no avail. The location bar settings I have set under 'Privacy' is to 'History' only - yet there are some URLs 'stuck' in the drop down list that I have not recently visited and do not feature in the 'Show All History'
Plesae help!