application is not switched by pressing the button, if this application open dialog box. such as Update Manager while downloading and installing updates
Could you be a bit more specific?
xfce version 4.6.1, linux core 2.6.32-24-generic, plugin - task list. i added many plugins to panel, where applications and folders. One of these plugins is task-list. task list show buttons of runned applications. if I open dialog window, such as Preferences in Eclipse, and change application, I can not select Eclipse after. if you need more information, soobschint me, I'll explain everything
That is by design in the window manager. If you open the preferences in eclipse, you probably also cannot click on the eclipse window, it won't get focus. If that is the case, eclipse made the dialog 'a transient modal' meaning it always stays on top of the other window.