not seen here, but i have A780.
it takes ages to open the dialog, but never crashed to desktop.
maybe your system is too full loaded with applications
have you tried a restart?
im having problem with the "open with" file.. is anyone experiencing this problem? when i "open with" and press more, it will be gone to desktop like reloading the menu..
i figured it out.. one of my native game has no name on it, after i uninstalled that then it worked just fine again..