From 4501585:

16) open the native windows file chooser and select the "details" view.
    now select a file and hit enter on your keyboard: the chooser closes
    and you have selected that file.

    now open JFileChooser, select "details" view, select a file and hit
    enter on the keyboard: the selected file is deselected, and is
    selected the file under it. if it was the last file then the first
    file is selected.

Reproducible using 1.4.2 on Win2k and XP.