diff --git a/js/admin/dist/app.js b/js/admin/dist/app.js
index c325ba7bd..24a526bcd 100644
--- a/js/admin/dist/app.js
+++ b/js/admin/dist/app.js
@@ -21358,12 +21358,12 @@ System.register('flarum/helpers/listItems', ['flarum/components/Separator', 'fla
         item.attrs.key = item.attrs.key || item.itemName;
       }
 
-      return [isListItem ? item : m(
+      return isListItem ? item : m(
         'li',
         { className: classList([item.itemName ? 'item-' + item.itemName : '', className, active ? 'active' : '']),
           key: item.itemName },
         item
-      )];
+      );
     });
   }
 
diff --git a/js/forum/dist/app.js b/js/forum/dist/app.js
index 4e5930a85..60a6267de 100644
--- a/js/forum/dist/app.js
+++ b/js/forum/dist/app.js
@@ -19714,14 +19714,13 @@ System.register('flarum/components/CommentPost', ['flarum/components/Post', 'fla
         }, {
           key: 'content',
           value: function content() {
+            // Note: we avoid using JSX for the <ul> below because it results in some
+            // weirdness in Mithril.js 0.1.x (see flarum/core#975). This workaround can
+            // be reverted when we upgrade to Mithril 1.0.
             return babelHelpers.get(Object.getPrototypeOf(CommentPost.prototype), 'content', this).call(this).concat([m(
               'header',
               { className: 'Post-header' },
-              m(
-                'ul',
-                null,
-                listItems(this.headerItems().toArray())
-              )
+              m('ul', listItems(this.headerItems().toArray()))
             ), m(
               'div',
               { className: 'Post-body' },
@@ -28598,12 +28597,12 @@ System.register('flarum/helpers/listItems', ['flarum/components/Separator', 'fla
         item.attrs.key = item.attrs.key || item.itemName;
       }
 
-      return [isListItem ? item : m(
+      return isListItem ? item : m(
         'li',
         { className: classList([item.itemName ? 'item-' + item.itemName : '', className, active ? 'active' : '']),
           key: item.itemName },
         item
-      )];
+      );
     });
   }
 
diff --git a/js/forum/src/components/CommentPost.js b/js/forum/src/components/CommentPost.js
index 8e91096ac..e31be5ed1 100644
--- a/js/forum/src/components/CommentPost.js
+++ b/js/forum/src/components/CommentPost.js
@@ -41,8 +41,11 @@ export default class CommentPost extends Post {
   }
 
   content() {
+    // Note: we avoid using JSX for the <ul> below because it results in some
+    // weirdness in Mithril.js 0.1.x (see flarum/core#975). This workaround can
+    // be reverted when we upgrade to Mithril 1.0.
     return super.content().concat([
-      <header className="Post-header"><ul>{listItems(this.headerItems().toArray())}</ul></header>,
+      <header className="Post-header">{m('ul', listItems(this.headerItems().toArray()))}</header>,
       <div className="Post-body">
         {this.isEditing()
           ? <div className="Post-preview" config={this.configPreview.bind(this)}/>
diff --git a/js/lib/helpers/listItems.js b/js/lib/helpers/listItems.js
index d7ebe0544..651749bfc 100644
--- a/js/lib/helpers/listItems.js
+++ b/js/lib/helpers/listItems.js
@@ -39,17 +39,15 @@ export default function listItems(items) {
       item.attrs.key = item.attrs.key || item.itemName;
     }
 
-    return [
-      isListItem
-        ? item
-        : <li className={classList([
-            (item.itemName ? 'item-' + item.itemName : ''),
-            className,
-            (active ? 'active' : '')
-          ])}
-            key={item.itemName}>
-            {item}
-          </li>
-    ];
+    return isListItem
+      ? item
+      : <li className={classList([
+          (item.itemName ? 'item-' + item.itemName : ''),
+          className,
+          (active ? 'active' : '')
+        ])}
+          key={item.itemName}>
+          {item}
+        </li>;
   });
 }