Unity2D Dash Launchers fail

view full story

http://askubuntu.com – When using Unity2D, most of the programs on the dash don't work. If I click on an icon e.g. VLC Media Player, the dash disappears and then nothing else happens (i.e. program does not start). The ones on the sidebar do. (Unity Unity3D and Gnome Classic all the launchers work fine). How can I fix the programs on the dash in unity2d? If it makes any difference I'm using Unity in a right to left language, so the dash and launcher bar appears from the right hand side. (HowTos)