diff --git a/packages/backend/src/core/activitypub/models/ApNoteService.ts b/packages/backend/src/core/activitypub/models/ApNoteService.ts
index 5ca5f6e84..5bbb036e0 100644
--- a/packages/backend/src/core/activitypub/models/ApNoteService.ts
+++ b/packages/backend/src/core/activitypub/models/ApNoteService.ts
@@ -71,7 +71,7 @@ export class ApNoteService {
 	}
 
 	@bindThis
-	public validateNote(object: any, uri: string) {
+	public validateNote(object: IObject, uri: string) {
 		const expectHost = this.utilityService.extractDbHost(uri);
 	
 		if (object == null) {
@@ -85,9 +85,10 @@ export class ApNoteService {
 		if (object.id && this.utilityService.extractDbHost(object.id) !== expectHost) {
 			return new Error(`invalid Note: id has different host. expected: ${expectHost}, actual: ${this.utilityService.extractDbHost(object.id)}`);
 		}
-	
-		if (object.attributedTo && this.utilityService.extractDbHost(getOneApId(object.attributedTo)) !== expectHost) {
-			return new Error(`invalid Note: attributedTo has different host. expected: ${expectHost}, actual: ${this.utilityService.extractDbHost(object.attributedTo)}`);
+
+		const actualHost = object.attributedTo && this.utilityService.extractDbHost(getOneApId(object.attributedTo));
+		if (object.attributedTo && actualHost !== expectHost) {
+			return new Error(`invalid Note: attributedTo has different host. expected: ${expectHost}, actual: ${actualHost}`);
 		}
 	
 		return null;
diff --git a/packages/frontend/src/components/MkReactionsViewer.details.vue b/packages/frontend/src/components/MkReactionsViewer.details.vue
index b4210be91..f5e611c62 100644
--- a/packages/frontend/src/components/MkReactionsViewer.details.vue
+++ b/packages/frontend/src/components/MkReactionsViewer.details.vue
@@ -10,7 +10,7 @@
 				<MkAvatar :class="$style.avatar" :user="u"/>
 				<MkUserName :user="u" :nowrap="true"/>
 			</div>
-			<div v-if="users.length > 10">+{{ count - 10 }}</div>
+			<div v-if="users.length > 10" :class="$style.more">+{{ count - 10 }}</div>
 		</div>
 	</div>
 </MkTooltip>
@@ -50,7 +50,9 @@ function getReactionName(reaction: string): string {
 
 .reaction {
 	max-width: 100px;
+	padding-right: 10px;
 	text-align: center;
+	border-right: solid 0.5px var(--divider);
 }
 
 .reactionIcon {
@@ -66,25 +68,20 @@ function getReactionName(reaction: string): string {
 }
 
 .users {
+	contain: content;
 	flex: 1;
 	min-width: 0;
+	margin: -4px 14px 0 10px;
 	font-size: 0.95em;
-	border-left: solid 0.5px var(--divider);
-	padding-left: 10px;
-	margin-left: 10px;
-	margin-right: 14px;
 	text-align: left;
 }
 
 .user {
 	line-height: 24px;
+	padding-top: 4px;
 	white-space: nowrap;
 	overflow: hidden;
 	text-overflow: ellipsis;
-
-	&:not(:last-child) {
-		margin-bottom: 3px;
-	}
 }
 
 .avatar {
@@ -92,4 +89,8 @@ function getReactionName(reaction: string): string {
 	height: 24px;
 	margin-right: 3px;
 }
+
+.more {
+	padding-top: 4px;
+}
 </style>