I think that all uploaded packages are ready to go from -proposed to -updates. For xenial and and trusty I both created new VMs with landscape-client installed from -proposed, and installed landscape-client from -proposed on existing machines that already were registered with Landscape.
For yakkety, I didn't have an existing machine, so I only created a VM and installed landscape-client from -proposed, and registered it with Landscape.
I've confirmed that no machines that have landscape-client from -proposed reports packages from -backports. I've also confirmed that both manual upgrades and automatic upgrades through upgrade profiles work. The machines have successfully communicated with Landscape, performed upgrades, and reporting information since almost a week now. I haven't noticed any problems so far.
The original reporter also confirmed that the package from xenial-proposed fixed his original problem.
I think that all uploaded packages are ready to go from -proposed to -updates. For xenial and and trusty I both created new VMs with landscape-client installed from -proposed, and installed landscape-client from -proposed on existing machines that already were registered with Landscape.
For yakkety, I didn't have an existing machine, so I only created a VM and installed landscape-client from -proposed, and registered it with Landscape.
I've confirmed that no machines that have landscape-client from -proposed reports packages from -backports. I've also confirmed that both manual upgrades and automatic upgrades through upgrade profiles work. The machines have successfully communicated with Landscape, performed upgrades, and reporting information since almost a week now. I haven't noticed any problems so far.
The original reporter also confirmed that the package from xenial-proposed fixed his original problem.