diff --git a/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.js b/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.js
index 582bb0d39c..a6186010b4 100644
--- a/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.js
+++ b/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.js
@@ -199,12 +199,13 @@ class EmojiPickerMenu extends React.PureComponent {
     };
   }
 
-  handleClick = emoji => {
+  handleClick = (emoji, event) => {
     if (!emoji.native) {
       emoji.native = emoji.colons;
     }
-
-    this.props.onClose();
+    if (!event.ctrlKey) {
+      this.props.onClose();
+    }
     this.props.onPick(emoji);
   }
 
diff --git a/app/javascript/mastodon/features/ui/components/compose_panel.js b/app/javascript/mastodon/features/ui/components/compose_panel.js
index c7821f473a..3d0c48c7a9 100644
--- a/app/javascript/mastodon/features/ui/components/compose_panel.js
+++ b/app/javascript/mastodon/features/ui/components/compose_panel.js
@@ -1,16 +1,36 @@
 import React from 'react';
+import { connect } from 'react-redux';
+import PropTypes from 'prop-types';
 import SearchContainer from 'mastodon/features/compose/containers/search_container';
 import ComposeFormContainer from 'mastodon/features/compose/containers/compose_form_container';
 import NavigationContainer from 'mastodon/features/compose/containers/navigation_container';
 import LinkFooter from './link_footer';
+import { changeComposing } from 'mastodon/actions/compose';
 
-const ComposePanel = () => (
-  <div className='compose-panel'>
-    <SearchContainer openInRoute />
-    <NavigationContainer />
-    <ComposeFormContainer singleColumn />
-    <LinkFooter withHotkeys />
-  </div>
-);
+export default @connect()
+class ComposePanel extends React.PureComponent {
 
-export default ComposePanel;
+  static propTypes = {
+    dispatch: PropTypes.func.isRequired,
+  };
+
+  onFocus = () => {
+    this.props.dispatch(changeComposing(true));
+  }
+
+  onBlur = () => {
+    this.props.dispatch(changeComposing(false));
+  }
+
+  render() {
+    return (
+      <div className='compose-panel' onFocus={this.onFocus}>
+        <SearchContainer openInRoute />
+        <NavigationContainer onClose={this.onBlur} />
+        <ComposeFormContainer singleColumn />
+        <LinkFooter withHotkeys />
+      </div>
+    );
+  }
+
+}
diff --git a/app/javascript/mastodon/features/ui/index.js b/app/javascript/mastodon/features/ui/index.js
index 81ffad22ed..d21ecf2088 100644
--- a/app/javascript/mastodon/features/ui/index.js
+++ b/app/javascript/mastodon/features/ui/index.js
@@ -254,6 +254,7 @@ class UI extends React.PureComponent {
     dispatch(synchronouslySubmitMarkers());
 
     if (isComposing && (hasComposingText || hasMediaAttachments)) {
+      e.preventDefault();
       // Setting returnValue to any string causes confirmation dialog.
       // Many browsers no longer display this text to users,
       // but we set user-friendly message for other browsers, e.g. Edge.
diff --git a/app/javascript/styles/mastodon/forms.scss b/app/javascript/styles/mastodon/forms.scss
index 0e5b00e8f1..7a0b2f9a39 100644
--- a/app/javascript/styles/mastodon/forms.scss
+++ b/app/javascript/styles/mastodon/forms.scss
@@ -587,7 +587,7 @@ code {
 
   &.alert {
     border: 1px solid rgba($error-value-color, 0.5);
-    background: rgba($error-value-color, 0.25);
+    background: rgba($error-value-color, 0.1);
     color: $error-value-color;
   }
 
diff --git a/app/models/concerns/domain_normalizable.rb b/app/models/concerns/domain_normalizable.rb
index c00b3142fa..fb84058fc2 100644
--- a/app/models/concerns/domain_normalizable.rb
+++ b/app/models/concerns/domain_normalizable.rb
@@ -4,7 +4,7 @@ module DomainNormalizable
   extend ActiveSupport::Concern
 
   included do
-    before_save :normalize_domain
+    before_validation :normalize_domain
   end
 
   private
diff --git a/app/models/domain_block.rb b/app/models/domain_block.rb
index f0a5bd296b..2b18e01fad 100644
--- a/app/models/domain_block.rb
+++ b/app/models/domain_block.rb
@@ -50,11 +50,13 @@ class DomainBlock < ApplicationRecord
     def rule_for(domain)
       return if domain.blank?
 
-      uri      = Addressable::URI.new.tap { |u| u.host = domain.gsub(/[\/]/, '') }
+      uri      = Addressable::URI.new.tap { |u| u.host = domain.strip.gsub(/[\/]/, '') }
       segments = uri.normalized_host.split('.')
       variants = segments.map.with_index { |_, i| segments[i..-1].join('.') }
 
       where(domain: variants).order(Arel.sql('char_length(domain) desc')).first
+    rescue Addressable::URI::InvalidURIError, IDN::Idna::IdnaError
+      nil
     end
   end