"show directory sizes" gives wrong values

[bulia byak]

The Command / Show directory sizes menu item gives wrong values. For example, du -b gives 5033406464 (approx 5Gb) for a subdir but mc reports only 2147483 bytes for the same subdir. In another example, 35108 Kb is reported by du but 27733K is seen by mc. Perhaps this latter case can be ascribed to different methods of determining file sizes, but in the first case the difference is just too large. The size reported by mc (2147483) is even less than the sum of file sizes in that subdir only, without subsubdirs, which is 2216660 (obtained by selecting all files in that subdir in mc). 

Is this a known bug or is it only on my system? What might go wrong here?
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