Motion blur issue

[stevesideas]

I have a few issues with Motion blur.

1. I turn all samples to 1 on all geometry apart from one item where the motion blur samples are 8. I've made sure that default motion samples is off.

Motion blur is still applied to everything.

2. I do a render mask and include one item that has 8 geometry motion blur samples. It appears in a completely different place to the version without motion blur. I have adjusted the camera setting: shutter: 1 second

I'm sure in previous versions I've not encountered these issues when carrying out exactly the same process.

[stevesideas]

If anyone is interested it was because I had the camera set motion blur type: seconds. When I switch to degrees or frames it seemed to resolve. I guess the documentation will explain why this is happening.