I also have this bug on a fresh install of Ubuntu 13.10.
However, first I had trouble recreating the bug when I followed the instructions. But I clicked in the other application an additional time (which was not described in step 4) , and not only on the icon in the launcher. This already seemed to circumvent the bug, which would imply that some event that is triggered once you click/(or do something) in the other application does the magic which should also be executed once you click the icon in the launcher.
I also have this bug on a fresh install of Ubuntu 13.10.
However, first I had trouble recreating the bug when I followed the instructions. But I clicked in the other application an additional time (which was not described in step 4) , and not only on the icon in the launcher. This already seemed to circumvent the bug, which would imply that some event that is triggered once you click/(or do something) in the other application does the magic which should also be executed once you click the icon in the launcher.