If you have tons of bookmarks, NetPositive may take a while to make them available; the browser will still load quickly and work just fine, but your Bookmarks menu may be empty until the whole bookmark hierarchy has been scanned.
If you have more than a 100 or so bookmarks, try moving some of your larger bookmark folders to another folder or partition. You can then make a symlink to the new location inside your bookmarks folder for easy access (though this symlink will not appear in the bookmarks menu — you’ll have to open Show Bookmarks and dig it up manually).