Krusader is a very nice file manager with lots of features. One thing that I find useful everyday is its ability to have multiple directories in different tabs. The following screenshot shows the location of these tabs in both the panes.
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Here I am using Debian Etch (Stable), Qt: 3.3.7, KDE: 3.5.5, Krusader: 1.70.1 "Round Robin" . The above screenshot is produced by ksnapshot, edited by kolourpaint.