it looks like to be the problem with Custom Desktop Command Execution Widget.

For me this is by far the best candidate for this problem.

I had allot of hang ups when launching wrong codes from this widget, and my guess is every now and then it crashes and makes the whole hildon home lock up.

Kill all hildon home is not a very good solution, because 90% of all the widgets get removed..

Also i mentioned that removed widgets of the command execution widgets are still being saved. and after adding a new one it still puts the old removed one back on its place. this can be one of the problems wich causes these crashes. Maybe old removed widgets still get loaded from time to time causing it