diff --git a/pkg/api/errors/errors.go b/pkg/api/errors/errors.go
index d0b4d53ca04..70c43b40c9b 100644
--- a/pkg/api/errors/errors.go
+++ b/pkg/api/errors/errors.go
@@ -90,11 +90,6 @@ func (list errorListInternal) Error() string {
 	return strings.Join(sl, "; ")
 }
 
-// Deprecated, will be removed soon.
-func (list *ErrorList) Append(errs ...error) {
-	*list = append(*list, errs...)
-}
-
 // ToError converts an ErrorList into a "normal" error, or nil if the list is empty.
 func (list ErrorList) ToError() error {
 	if len(list) == 0 {
diff --git a/pkg/api/validation.go b/pkg/api/validation.go
index e4d10b9a3dc..7038fa71ba2 100644
--- a/pkg/api/validation.go
+++ b/pkg/api/validation.go
@@ -37,14 +37,14 @@ func validateVolumes(volumes []Volume) (util.StringSet, errs.ErrorList) {
 			el = validateSource(vol.Source)
 		}
 		if !util.IsDNSLabel(vol.Name) {
-			el.Append(errs.NewInvalid("Volume.Name", vol.Name))
+			el = append(el, errs.NewInvalid("Volume.Name", vol.Name))
 		} else if allNames.Has(vol.Name) {
-			el.Append(errs.NewDuplicate("Volume.Name", vol.Name))
+			el = append(el, errs.NewDuplicate("Volume.Name", vol.Name))
 		}
 		if len(el) == 0 {
 			allNames.Insert(vol.Name)
 		} else {
-			allErrs.Append(el...)
+			allErrs = append(allErrs, el...)
 		}
 	}
 	return allNames, allErrs
@@ -55,14 +55,14 @@ func validateSource(source *VolumeSource) errs.ErrorList {
 	allErrs := errs.ErrorList{}
 	if source.HostDirectory != nil {
 		numVolumes++
-		allErrs.Append(validateHostDir(source.HostDirectory)...)
+		allErrs = append(allErrs, validateHostDir(source.HostDirectory)...)
 	}
 	if source.EmptyDirectory != nil {
 		numVolumes++
 		//EmptyDirs have nothing to validate
 	}
 	if numVolumes != 1 {
-		allErrs.Append(errs.NewInvalid("Volume.Source", source))
+		allErrs = append(allErrs, errs.NewInvalid("Volume.Source", source))
 	}
 	return allErrs
 }
@@ -70,7 +70,7 @@ func validateSource(source *VolumeSource) errs.ErrorList {
 func validateHostDir(hostDir *HostDirectory) errs.ErrorList {
 	allErrs := errs.ErrorList{}
 	if hostDir.Path == "" {
-		allErrs.Append(errs.NewNotFound("HostDir.Path", hostDir.Path))
+		allErrs = append(allErrs, errs.NewNotFound("HostDir.Path", hostDir.Path))
 	}
 	return allErrs
 }
@@ -85,25 +85,25 @@ func validatePorts(ports []Port) errs.ErrorList {
 		port := &ports[i] // so we can set default values
 		if len(port.Name) > 0 {
 			if len(port.Name) > 63 || !util.IsDNSLabel(port.Name) {
-				allErrs.Append(errs.NewInvalid("Port.Name", port.Name))
+				allErrs = append(allErrs, errs.NewInvalid("Port.Name", port.Name))
 			} else if allNames.Has(port.Name) {
-				allErrs.Append(errs.NewDuplicate("Port.name", port.Name))
+				allErrs = append(allErrs, errs.NewDuplicate("Port.name", port.Name))
 			} else {
 				allNames.Insert(port.Name)
 			}
 		}
 		if !util.IsValidPortNum(port.ContainerPort) {
-			allErrs.Append(errs.NewInvalid("Port.ContainerPort", port.ContainerPort))
+			allErrs = append(allErrs, errs.NewInvalid("Port.ContainerPort", port.ContainerPort))
 		}
 		if port.HostPort == 0 {
 			port.HostPort = port.ContainerPort
 		} else if !util.IsValidPortNum(port.HostPort) {
-			allErrs.Append(errs.NewInvalid("Port.HostPort", port.HostPort))
+			allErrs = append(allErrs, errs.NewInvalid("Port.HostPort", port.HostPort))
 		}
 		if len(port.Protocol) == 0 {
 			port.Protocol = "TCP"
 		} else if !supportedPortProtocols.Has(strings.ToUpper(port.Protocol)) {
-			allErrs.Append(errs.NewNotSupported("Port.Protocol", port.Protocol))
+			allErrs = append(allErrs, errs.NewNotSupported("Port.Protocol", port.Protocol))
 		}
 	}
 	return allErrs
@@ -115,10 +115,10 @@ func validateEnv(vars []EnvVar) errs.ErrorList {
 	for i := range vars {
 		ev := &vars[i] // so we can set default values
 		if len(ev.Name) == 0 {
-			allErrs.Append(errs.NewInvalid("EnvVar.Name", ev.Name))
+			allErrs = append(allErrs, errs.NewInvalid("EnvVar.Name", ev.Name))
 		}
 		if !util.IsCIdentifier(ev.Name) {
-			allErrs.Append(errs.NewInvalid("EnvVar.Name", ev.Name))
+			allErrs = append(allErrs, errs.NewInvalid("EnvVar.Name", ev.Name))
 		}
 	}
 	return allErrs
@@ -130,14 +130,14 @@ func validateVolumeMounts(mounts []VolumeMount, volumes util.StringSet) errs.Err
 	for i := range mounts {
 		mnt := &mounts[i] // so we can set default values
 		if len(mnt.Name) == 0 {
-			allErrs.Append(errs.NewInvalid("VolumeMount.Name", mnt.Name))
+			allErrs = append(allErrs, errs.NewInvalid("VolumeMount.Name", mnt.Name))
 		} else if !volumes.Has(mnt.Name) {
-			allErrs.Append(errs.NewNotFound("VolumeMount.Name", mnt.Name))
+			allErrs = append(allErrs, errs.NewNotFound("VolumeMount.Name", mnt.Name))
 		}
 		if len(mnt.MountPath) == 0 {
 			// Backwards compat.
 			if len(mnt.Path) == 0 {
-				allErrs.Append(errs.NewInvalid("VolumeMount.MountPath", mnt.MountPath))
+				allErrs = append(allErrs, errs.NewInvalid("VolumeMount.MountPath", mnt.MountPath))
 			} else {
 				glog.Warning("DEPRECATED: VolumeMount.Path has been replaced by VolumeMount.MountPath")
 				mnt.MountPath = mnt.Path
@@ -161,7 +161,7 @@ func AccumulateUniquePorts(containers []Container, accumulator map[int]bool, ext
 		for pi := range ctr.Ports {
 			port := extract(&ctr.Ports[pi])
 			if accumulator[port] {
-				allErrs.Append(errs.NewDuplicate("Port", port))
+				allErrs = append(allErrs, errs.NewDuplicate("Port", port))
 			} else {
 				accumulator[port] = true
 			}
@@ -183,25 +183,25 @@ func validateContainers(containers []Container, volumes util.StringSet) errs.Err
 	for i := range containers {
 		ctr := &containers[i] // so we can set default values
 		if !util.IsDNSLabel(ctr.Name) {
-			allErrs.Append(errs.NewInvalid("Container.Name", ctr.Name))
+			allErrs = append(allErrs, errs.NewInvalid("Container.Name", ctr.Name))
 		} else if allNames.Has(ctr.Name) {
-			allErrs.Append(errs.NewDuplicate("Container.Name", ctr.Name))
+			allErrs = append(allErrs, errs.NewDuplicate("Container.Name", ctr.Name))
 		} else {
 			allNames.Insert(ctr.Name)
 		}
 		if len(ctr.Image) == 0 {
-			allErrs.Append(errs.NewInvalid("Container.Image", ctr.Name))
+			allErrs = append(allErrs, errs.NewInvalid("Container.Image", ctr.Name))
 		}
-		allErrs.Append(validatePorts(ctr.Ports)...)
-		allErrs.Append(validateEnv(ctr.Env)...)
-		allErrs.Append(validateVolumeMounts(ctr.VolumeMounts, volumes)...)
+		allErrs = append(allErrs, validatePorts(ctr.Ports)...)
+		allErrs = append(allErrs, validateEnv(ctr.Env)...)
+		allErrs = append(allErrs, validateVolumeMounts(ctr.VolumeMounts, volumes)...)
 	}
 	// Check for colliding ports across all containers.
 	// TODO(thockin): This really is dependent on the network config of the host (IP per pod?)
 	// and the config of the new manifest.  But we have not specced that out yet, so we'll just
 	// make some assumptions for now.  As of now, pods share a network namespace, which means that
 	// every Port.HostPort across the whole pod must be unique.
-	allErrs.Append(checkHostPortConflicts(containers)...)
+	allErrs = append(allErrs, checkHostPortConflicts(containers)...)
 
 	return allErrs
 }
@@ -216,15 +216,15 @@ func ValidateManifest(manifest *ContainerManifest) []error {
 	allErrs := errs.ErrorList{}
 
 	if len(manifest.Version) == 0 {
-		allErrs.Append(errs.NewInvalid("ContainerManifest.Version", manifest.Version))
+		allErrs = append(allErrs, errs.NewInvalid("ContainerManifest.Version", manifest.Version))
 	} else if !supportedManifestVersions.Has(strings.ToLower(manifest.Version)) {
-		allErrs.Append(errs.NewNotSupported("ContainerManifest.Version", manifest.Version))
+		allErrs = append(allErrs, errs.NewNotSupported("ContainerManifest.Version", manifest.Version))
 	}
 	allVolumes, errs := validateVolumes(manifest.Volumes)
 	if len(errs) != 0 {
-		allErrs.Append(errs...)
+		allErrs = append(allErrs, errs...)
 	}
-	allErrs.Append(validateContainers(manifest.Containers, allVolumes)...)
+	allErrs = append(allErrs, validateContainers(manifest.Containers, allVolumes)...)
 	return []error(allErrs)
 }
 
@@ -235,7 +235,7 @@ func ValidatePodState(podState *PodState) []error {
 	} else if podState.RestartPolicy.Type != RestartAlways &&
 		podState.RestartPolicy.Type != RestartOnFailure &&
 		podState.RestartPolicy.Type != RestartNever {
-		allErrs.Append(errs.NewNotSupported("PodState.RestartPolicy.Type", podState.RestartPolicy.Type))
+		allErrs = append(allErrs, errs.NewNotSupported("PodState.RestartPolicy.Type", podState.RestartPolicy.Type))
 	}
 
 	return []error(allErrs)
@@ -245,9 +245,9 @@ func ValidatePodState(podState *PodState) []error {
 func ValidatePod(pod *Pod) []error {
 	allErrs := errs.ErrorList{}
 	if pod.ID == "" {
-		allErrs.Append(errs.NewInvalid("Pod.ID", pod.ID))
+		allErrs = append(allErrs, errs.NewInvalid("Pod.ID", pod.ID))
 	}
-	allErrs.Append(ValidatePodState(&pod.DesiredState)...)
+	allErrs = append(allErrs, ValidatePodState(&pod.DesiredState)...)
 	return []error(allErrs)
 }
 
@@ -255,12 +255,12 @@ func ValidatePod(pod *Pod) []error {
 func ValidateService(service *Service) []error {
 	allErrs := errs.ErrorList{}
 	if service.ID == "" {
-		allErrs.Append(errs.NewInvalid("Service.ID", service.ID))
+		allErrs = append(allErrs, errs.NewInvalid("Service.ID", service.ID))
 	} else if !util.IsDNS952Label(service.ID) {
-		allErrs.Append(errs.NewInvalid("Service.ID", service.ID))
+		allErrs = append(allErrs, errs.NewInvalid("Service.ID", service.ID))
 	}
 	if labels.Set(service.Selector).AsSelector().Empty() {
-		allErrs.Append(errs.NewInvalid("Service.Selector", service.Selector))
+		allErrs = append(allErrs, errs.NewInvalid("Service.Selector", service.Selector))
 	}
 	return []error(allErrs)
 }