Issues with keys in loops

[alastairzotos]

This is a cool project. I've just tried the todo list example and I've found that when adding a couple of items, randomly selecting some as "done" and then clicking "hide completed", the resulting list is incorrect, and the checkboxes aren't correctly checked too.

[dchester]

Thanks -- looks like the resulting list is correct, but the checkbox checked property was out of sync. Looking better now with version 0.7.3