I'm using TS6.7.1 and testing Patch 1789. I just discovered that the behavior for the transitiontask URL is changed before and after the patch.
For a user task with 2 transitions defined (approve and reject), before the patch, if I call
http://myserver/iw-cc/transitiontask?taskid=12345, I get a transition screen with 2 radio button (approve, reject) to choose from, the click "OK" or "Cancel" to complete the transition.
After the patch, the same call
http://myserver/iw-cc/transitiontask?taskid=12345 result in an error message about transition being null.
I can't find any documentation, but after playing with it, it seems that this works:
http://myserver/iw-cc/transitiontask?taskid=12345&transition=approveHowever, that means we need to change all our email template code. I can understand that it is better in some case to be able to pass the transition name directly. But why not make it backward compatible???