I've noticed one more thing.
I'm using the Windows 7 style taskbar where you can "pin" applications to the taskbar.
In this case I've pinned the Apache Directory Studio icon from the startmenu which points to: "C:\Program Files\Apache Directory Studio\Apache Directory Studio.exe"
When clicking on the icon in the taskbar it starts Studio as it should but then the icon should change into the icon of the running app.
This doesn't happen with Studio 2M2. The icon is changed while Studio is loading and it even has a nice progress bar shown in the taskbar, then when it has loaded the icon is changed back as if the app isn't running and another icon for the running Studio is displayed.
I'm not marking this as a bug since it could be by design to allow loading several Studio instances at once? In this case PuTTY has a nicer way of doing it, since you can right click on the running instance in the taskbar and start a new instance.