Bug 73984 Editing user library jar path after path change does not work [build path]
1) Create a directory containing jar file 2) Add this jar file to a new user library 3) Rename directory from 1) 4) Update the path to jar file in user libraries (select old jar reference, select new location in browser, open -> path is not updated, but old path is still used
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/UserLibraryPreferencePage.java
} catch (IOException e) {
						fExportImportList.removeAllElements();
						fExportImportList.setEnabled(false);
						return new StatusInfo(IStatus.ERROR, PreferencesMessages.getString("UserLibraryPreferencePage.LoadSaveDialog.error.invalidfile")); 
					}
				}
			}
			return status;
		}
		/* (non-Javadoc)
		 * @see org.eclipse.jdt.internal.ui.wizards.dialogfields.IDialogFieldListener#dialogFieldChanged(org.eclipse.jdt.internal.ui.wizards.dialogfields.DialogField)
		 */
		public void dialogFieldChanged(DialogField field) {
			if (field == fLocationField) {
				IStatus status= validateSettings();
				if (!isSave()) {
					status= updateShownLibraries(status);
				}
				updateStatus(status);
			} else if (field == fExportImportList) {
				updateStatus(validateSettings());
			}
		}
		
		/* (non-Javadoc)
		 * @see org.eclipse.jdt.internal.ui.wizards.dialogfields.IListAdapter#customButtonPressed(org.eclipse.jdt.internal.ui.wizards.dialogfields.ListDialogField, int)
		 */
		public void customButtonPressed(ListDialogField field, int index) {
		}
		/* (non-Javadoc)