### Other notable changes

* Kubernetes json deserializer is now case-sensitive to restore compatibility with pre-1.8 servers. ([#65157](https://github.com/kubernetes/kubernetes/pull/65157), [@caesarxuchao](https://github.com/caesarxuchao))
    * If your config files contains fields with wrong case, the config files will be now invalid.

the DockerValidor and ServiceCheck for the `docker` service from kubeadm preflight. Docker is no longer special cased during host validation and ideally this task should be done in the now external cri-dockerd project where the importance of the compatibility matters. Use `crictl` for all communication with CRI sockets for actions like pulling images and obtaining a list of running containers instead of using the docker CLI in the case of Docker. ([#107317](https://github.com/kubernetes/kubernetes/pull/107317),...

touch-enabled device, mouseenter/leave are fired as\n        // part of the mouse compatibility events on first tap - the carousel\n        // would stop cycling until user tapped out of it;\n        // here, we listen for touchend, explicitly pause the carousel\n        // (as if it's the second time we tap on it, mouseenter compat event\n        // is NOT fired) and after a timeout (to allow for mouse compatibility\n        // events to fire) we explicitly restart cycling\n\n        this.pause()\n...

		return
	})
	return mg
}

// getHistogramMetrics fetches histogram metrics and returns it in a []Metric
// Note: Typically used in MetricGroup.RegisterRead
//
// The last parameter is added for compatibility - if true it lowercases the
// `api` label values.
func getHistogramMetrics(hist *prometheus.HistogramVec, desc MetricDescription, toLowerAPILabels bool) []MetricV2 {
	ch := make(chan prometheus.Metric)
	go func() {

  // HTTPGet specifies the http request to perform.
  // +optional
  optional HTTPGetAction httpGet = 2;

  // Deprecated. TCPSocket is NOT supported as a LifecycleHandler and kept
  // for the backward compatibility. There are no validation of this field and
  // lifecycle hooks will fail in runtime when tcp handler is specified.
  // +optional
  optional TCPSocketAction tcpSocket = 3;
}

- Feature `AllowServiceLBStatusOnNonLB` remains deprecated and is now locked to false to support compatibility versions ([#128139](https://github.com/kubernetes/kubernetes/pull/128139), [@Jefftree](https://github.com/Jefftree)) [SIG Apps]

touch-enabled device, mouseenter/leave are fired as\n        // part of the mouse compatibility events on first tap - the carousel\n        // would stop cycling until user tapped out of it;\n        // here, we listen for touchend, explicitly pause the carousel\n        // (as if it's the second time we tap on it, mouseenter compat event\n        // is NOT fired) and after a timeout (to allow for mouse compatibility\n        // events to fire) we explicitly restart cycling\n\n        this.pause()\n...

		ResetID:         resetID,
		ResetBeforeDate: resetBeforeDate,
	}
	rs, ok := oi.UserDefined[targetResetHeader(arn)]
	if !ok {
		rs, ok = oi.UserDefined[xhttp.MinIOReplicationResetStatus] // for backward compatibility
	}
	if !ok { // existing object replication is enabled and object version is unreplicated so far.
		if resetID != "" && oi.ModTime.Before(resetBeforeDate) { // trigger replication if `mc replicate reset` requested

## Changes by Kind

### API Change

- Aggregated discovery now returns `responseKind: {}` for resources which are missing group/version/kind information, to ensure compatibility with v0.26.0-v0.26.3 clients. ([#119835](https://github.com/kubernetes/kubernetes/pull/119835), [@liggitt](https://github.com/liggitt)) [SIG API Machinery and Testing]

### Feature

### Failing Test

- Backport: e2e.test now uses the secure port to retrieve metrics data to ensure compatibility with 1.21 and 1.22 (for upgrade tests) (#104328, @pohly) [SIG API Machinery, Instrumentation, Storage and Testing]

### Bug or Regression

- Aggregate errors when putting vmss