I have a "Browse" button in mmt Swing interface which pops up a dialog box. I have used JFileChooser for this operation. By default "My Documents" folder of MS-Windows is displayed in the dialog.
In that particular folder only "New Folder" icon is disabled and also cannot create new folder by right clicking. But that "New Folder" icon is enabled in all the other directories and folders except "My Documents". This was reported as a bug in java: