webform_node_update() does not calculate the $all_cids correctly

Not sure what is going on here, but maybe it is a bug with PHP. In your webform_node_update function, I noticed that you are doing the following...

$original_cids = array_keys($original->webform['components']);
$current_cids = array_keys($node->webform['components']);

$all_cids = $original_cids + $current_cids;

Given the following arrays, this does not give you what I would expect from PHP....

Adding two arrays array(1,2,3) and array(2,3,4) surprisingly gives the following...

ubuntu@ip-172-19-125-130:~/main/www$ php -a
Interactive shell

php > print_r(array(1,2,3) + array(2,3,4));
Array
(
    [0] => 1
    [1] => 2
    [2] => 3
)
php > 

However, if you use array_merge it works as expected....

ubuntu@ip-172-19-125-130:~/main/www$ php -a
Interactive shell

php > print_r(array_merge(array(1,2,3),array(2,3,4)));
Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 2
    [4] => 3
    [5] => 4
)
php > 

Patch to follow....