The JComboBox used by JFileChooser to select file filters has seen a regression in merlin-beta2 that makes it difficult to select a filter with the mouse or traverse the JComboBox with the keyboard.

To see this in action, run the SwingSet2 demo and open the Preview JFileChooser. Try to select the "All Files" filter. It cannot be done until the other option is first selected. Nor can the JComboBox list be traversed by the keyboard.

Try the stand-alone FileChooserDemo. Check all boxes under "Filter Controls" and then show the FileChooser. The filter combo box cannot be traversed by the keyboard until another item has first been selected by the mouse.

--------------------

As reported by another user:

There was a weird problem with the file selection dialog. Let's say the
wildcard options had three entries, in order of appearance: *, *.class
and *.so. *.so is the default option. You couldn't select the *.class option
unless you first selected the "*" option. If the list had two entries and
the second was selected by default, you couldn't select the first at all.