### Other notable changes

* Connections from Pods to Services with 0 endpoints will now ICMP reject immediately, rather than blackhole and timeout. ([#72534](https://github.com/kubernetes/kubernetes/pull/72534), [@thockin](https://github.com/thockin))

- Kube-apiserver: Avoid unnecessary repeated calls to `admission webhooks` that reject an update or delete request. ([#104182](https://github.com/kubernetes/kubernetes/pull/104182), [@liggitt](https://github.com/liggitt))...

* If the `TokenRequestProjection` feature gate is disabled, projected serviceAccountToken volume sources are now dropped at object creation time, or at object update time if the existing object did not have a projected serviceAccountToken volume source. Previously, these would result in validation errors. ([#72714](https://github.com/kubernetes/kubernetes/pull/72714), [@mourya007](https://github.com/mourya007))...

- Added validation to reject Pods using the `PodLevelResources` feature on Windows OS due to lack of support. The API server rejects Pods with Pod-level resources and a `Pod.spec.os.name` targeting Windows. Kubelet on nodes running Windows also rejects Pods with Pod-level resources at admission phase. ([#133046](https://github.com/kubernetes/kubernetes/pull/133046), [@toVersus](https:...

* The apiserver sends external versioned object to the admission webhooks now. Please update the webhooks to expect admissionReview.spec.object.raw to be serialized external versions of objects.  ([#55127](https://github.com/kubernetes/kubernetes/pull/55127), [@caesarxuchao](https://github.com/caesarxuchao))

For more information, see [#53040](https://github.com/kubernetes/kubernetes/issues/53040).

* Object quotas are not consistently charged or updated. Specifically, the object count quota does not reliably account for uninitialized objects. Some quotas are charged only when an object is initialized. Others are charged when an object is created, whether it is initialized or not. We plan to fix this issue in a future release.

- Kube-apiserver: when merging lists, Server Side Apply now prefers the order of the submitted request instead of the existing persisted object. ([#107565](https://github.com/kubernetes/kubernetes/pull/107565), [@jiahuif](https://github.com/jiahuif))

### Other notable changes

* Connections from Pods to Services with 0 endpoints will now ICMP reject immediately, rather than blackhole and timeout. ([#72534](https://github.com/kubernetes/kubernetes/pull/72534), [@thockin](https://github.com/thockin))

via a new mime-type application/json;as=Table;v=v1alpha1;g=meta.k8s.io. The returned object (if the server supports it) will be of type meta.k8s.io/v1alpha1 with Table, and contain column and row information related to the resource. Each row will contain information about the resource - by default it will be the object metadata, but callers can add the ?includeObject=Object query parameter and receive the full object. In the future kubectl will use this to retrieve the results of `kubectl get`. ([#...

* kubelets are no longer allowed to delete their own Node API object. Prior to 1.11, in rare circumstances related to cloudprovider node ID changes, kubelets would attempt to delete/recreate their Node object at startup. If a legacy kubelet encounters this situation, a cluster admin can remove the Node object: `kubectl delete node/<nodeName>` ([#62818](https://github.com/kubernetes/kubernetes/pull/62818), [@mikedanese](https://github.com/mikedanese))...