diff --git a/app/javascript/mastodon/components/column_header.js b/app/javascript/mastodon/components/column_header.js
index 236e92296..cbbc490a8 100644
--- a/app/javascript/mastodon/components/column_header.js
+++ b/app/javascript/mastodon/components/column_header.js
@@ -119,8 +119,8 @@ class ColumnHeader extends React.PureComponent {
 
       moveButtons = (
         <div key='move-buttons' className='column-header__setting-arrows'>
-          <button title={formatMessage(messages.moveLeft)} aria-label={formatMessage(messages.moveLeft)} className='text-btn column-header__setting-btn' onClick={this.handleMoveLeft}><Icon id='chevron-left' /></button>
-          <button title={formatMessage(messages.moveRight)} aria-label={formatMessage(messages.moveRight)} className='text-btn column-header__setting-btn' onClick={this.handleMoveRight}><Icon id='chevron-right' /></button>
+          <button title={formatMessage(messages.moveLeft)} aria-label={formatMessage(messages.moveLeft)} className='icon-button column-header__setting-btn' onClick={this.handleMoveLeft}><Icon id='chevron-left' /></button>
+          <button title={formatMessage(messages.moveRight)} aria-label={formatMessage(messages.moveRight)} className='icon-button column-header__setting-btn' onClick={this.handleMoveRight}><Icon id='chevron-right' /></button>
         </div>
       );
     } else if (multiColumn && this.props.onPin) {
@@ -141,8 +141,8 @@ class ColumnHeader extends React.PureComponent {
     ];
 
     if (multiColumn) {
-      collapsedContent.push(moveButtons);
       collapsedContent.push(pinButton);
+      collapsedContent.push(moveButtons);
     }
 
     if (children || (multiColumn && this.props.onPin)) {
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 30ac804ea..12bc472f5 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -2822,7 +2822,7 @@ a.account__display-name {
   transition: background-color 0.2s ease;
 }
 
-.react-toggle:hover:not(.react-toggle--disabled) .react-toggle-track {
+.react-toggle:is(:hover, :focus-within):not(.react-toggle--disabled) .react-toggle-track {
   background-color: darken($ui-base-color, 10%);
 }
 
@@ -2830,7 +2830,7 @@ a.account__display-name {
   background-color: $ui-highlight-color;
 }
 
-.react-toggle--checked:hover:not(.react-toggle--disabled) .react-toggle-track {
+.react-toggle--checked:is(:hover, :focus-within):not(.react-toggle--disabled) .react-toggle-track {
   background-color: lighten($ui-highlight-color, 10%);
 }
 
@@ -3548,12 +3548,17 @@ a.status-card.compact:hover {
 }
 
 .column-header__setting-btn {
-  &:hover {
+  &:hover,
+  &:focus {
     color: $darker-text-color;
     text-decoration: underline;
   }
 }
 
+.column-header__collapsible__extra + .column-header__setting-btn {
+  padding-top: 5px;
+}
+
 .column-header__permission-btn {
   display: inline;
   font-weight: inherit;
@@ -3564,10 +3569,15 @@ a.status-card.compact:hover {
   float: right;
 
   .column-header__setting-btn {
-    padding: 0 10px;
+    padding: 5px;
+
+    &:first-child {
+      padding-right: 7px;
+    }
 
     &:last-child {
-      padding-right: 0;
+      padding-left: 7px;
+      margin-left: 5px;
     }
   }
 }
diff --git a/app/javascript/styles/mastodon/rtl.scss b/app/javascript/styles/mastodon/rtl.scss
index baacf46b9..ea7bb5113 100644
--- a/app/javascript/styles/mastodon/rtl.scss
+++ b/app/javascript/styles/mastodon/rtl.scss
@@ -126,6 +126,20 @@ body.rtl {
 
   .column-header__setting-arrows {
     float: left;
+
+    .column-header__setting-btn {
+      &:first-child {
+        padding-left: 7px;
+        padding-right: 5px;
+      }
+
+      &:last-child {
+        padding-right: 7px;
+        padding-left: 5px;
+        margin-right: 5px;
+        margin-left: 0;
+      }
+    }
   }
 
   .setting-toggle__label {
@@ -451,11 +465,6 @@ body.rtl {
     margin-left: 5px;
   }
 
-  .column-header__setting-arrows .column-header__setting-btn:last-child {
-    padding-left: 0;
-    padding-right: 10px;
-  }
-
   .simple_form .input.radio_buttons .radio > label input {
     left: auto;
     right: 0;
diff --git a/app/models/media_attachment.rb b/app/models/media_attachment.rb
index b57600356..a80087fa3 100644
--- a/app/models/media_attachment.rb
+++ b/app/models/media_attachment.rb
@@ -167,12 +167,11 @@ class MediaAttachment < ApplicationRecord
                     processors: ->(f) { file_processors f },
                     convert_options: GLOBAL_CONVERT_OPTIONS
 
-  before_file_post_process :set_type_and_extension
-  before_file_post_process :check_video_dimensions
+  before_file_validate :set_type_and_extension
+  before_file_validate :check_video_dimensions
 
   validates_attachment_content_type :file, content_type: IMAGE_MIME_TYPES + VIDEO_MIME_TYPES + AUDIO_MIME_TYPES
-  validates_attachment_size :file, less_than: IMAGE_LIMIT, unless: :larger_media_format?
-  validates_attachment_size :file, less_than: VIDEO_LIMIT, if: :larger_media_format?
+  validates_attachment_size :file, less_than: ->(m) { m.larger_media_format? ? VIDEO_LIMIT : IMAGE_LIMIT }
   remotable_attachment :file, VIDEO_LIMIT, suppress_errors: false, download_on_assign: false, attribute_name: :remote_url
 
   has_attached_file :thumbnail,
diff --git a/spec/models/media_attachment_spec.rb b/spec/models/media_attachment_spec.rb
index edab67d47..5dbb3d206 100644
--- a/spec/models/media_attachment_spec.rb
+++ b/spec/models/media_attachment_spec.rb
@@ -181,4 +181,32 @@ RSpec.describe MediaAttachment, type: :model do
       expect(media.description.size).to be <= 1_500
     end
   end
+
+  describe 'size limit validation' do
+    it 'rejects video files that are too large' do
+      stub_const 'MediaAttachment::IMAGE_LIMIT', 100.megabytes
+      stub_const 'MediaAttachment::VIDEO_LIMIT', 1.kilobyte
+      expect { MediaAttachment.create!(account: Fabricate(:account), file: attachment_fixture('attachment.webm')) }.to raise_error(ActiveRecord::RecordInvalid)
+    end
+
+    it 'accepts video files that are small enough' do
+      stub_const 'MediaAttachment::IMAGE_LIMIT', 1.kilobyte
+      stub_const 'MediaAttachment::VIDEO_LIMIT', 100.megabytes
+      media = MediaAttachment.create!(account: Fabricate(:account), file: attachment_fixture('attachment.webm'))
+      expect(media.valid?).to be true
+    end
+
+    it 'rejects image files that are too large' do
+      stub_const 'MediaAttachment::IMAGE_LIMIT', 1.kilobyte
+      stub_const 'MediaAttachment::VIDEO_LIMIT', 100.megabytes
+      expect { MediaAttachment.create!(account: Fabricate(:account), file: attachment_fixture('attachment.jpg')) }.to raise_error(ActiveRecord::RecordInvalid)
+    end
+
+    it 'accepts image files that are small enough' do
+      stub_const 'MediaAttachment::IMAGE_LIMIT', 100.megabytes
+      stub_const 'MediaAttachment::VIDEO_LIMIT', 1.kilobyte
+      media = MediaAttachment.create!(account: Fabricate(:account), file: attachment_fixture('attachment.jpg'))
+      expect(media.valid?).to be true
+    end
+  end
 end