diff --git a/phpBB/adm/style/acp_inactive.html b/phpBB/adm/style/acp_inactive.html
index 2e17bea47d..1b0b6d46de 100644
--- a/phpBB/adm/style/acp_inactive.html
+++ b/phpBB/adm/style/acp_inactive.html
@@ -45,7 +45,7 @@
 	</tr>
 <!-- BEGINELSE -->
 	<tr>
-		<td colspan="6" style="text-align: center;">{L_NO_INACTIVE_USERS}</td>
+		<td colspan="7" style="text-align: center;">{L_NO_INACTIVE_USERS}</td>
 	</tr>
 <!-- END inactive -->
 </tbody>
diff --git a/phpBB/adm/style/acp_styles.html b/phpBB/adm/style/acp_styles.html
index 81c24fe98a..4c95d21a4e 100644
--- a/phpBB/adm/style/acp_styles.html
+++ b/phpBB/adm/style/acp_styles.html
@@ -96,10 +96,10 @@
 	<thead>
 	<tr>
 		<th>{L_STYLE_NAME}</th>
-		<th width="10%" style="white-space: nowrap; text-align: center;">{{ lang('STYLE_VERSION') }}</th>
-		<th width="10%" style="white-space: nowrap; text-align: center;">{L_STYLE_PHPBB_VERSION}</th>
-		<!-- IF not STYLES_LIST_HIDE_COUNT --><th width="10%" style="white-space: nowrap; text-align: center;">{L_STYLE_USED_BY}</th><!-- ENDIF -->
-		<th width="25%" style="white-space: nowrap; text-align: center;">{L_ACTIONS}</th>
+		<th style="width: 10%; white-space: nowrap; text-align: center;">{{ lang('STYLE_VERSION') }}</th>
+		<th style="width: 10%; white-space: nowrap; text-align: center;">{L_STYLE_PHPBB_VERSION}</th>
+		<!-- IF not STYLES_LIST_HIDE_COUNT --><th style="width: 10%; white-space: nowrap; text-align: center;">{L_STYLE_USED_BY}</th><!-- ENDIF -->
+		<th style="width: 25%; white-space: nowrap; text-align: center;">{L_ACTIONS}</th>
 		{STYLES_LIST_EXTRA}
 		<th>&nbsp;</th>
 	</tr>
@@ -146,7 +146,7 @@
 			<!-- END actions -->
 		</td>
 		{styles_list.EXTRA}
-		<td class="{$ROW_CLASS} mark" width="20">
+		<td class="{$ROW_CLASS} mark" style="width: 20px;">
 			<!-- IF styles_list.STYLE_ID -->
 				{% if styles_list.STYLE_NAME !== 'prosilver' %}
 					<input class="checkbox" type="checkbox" name="ids[]" value="{styles_list.STYLE_ID}" />
diff --git a/phpBB/adm/style/overall_footer.html b/phpBB/adm/style/overall_footer.html
index c528ca13b4..948c611315 100644
--- a/phpBB/adm/style/overall_footer.html
+++ b/phpBB/adm/style/overall_footer.html
@@ -24,7 +24,7 @@
 
 		<div id="phpbb_alert" class="phpbb_alert" data-l-err="{L_ERROR}" data-l-timeout-processing-req="{L_TIMEOUT_PROCESSING_REQ}">
 			<a href="#" class="alert_close"></a>
-			<h3 class="alert_title"></h3><p class="alert_text"></p>
+			<h3 class="alert_title">&nbsp;</h3><p class="alert_text"></p>
 		</div>
 		<div id="phpbb_confirm" class="phpbb_alert">
 			<a href="#" class="alert_close"></a>
diff --git a/phpBB/styles/prosilver/template/simple_footer.html b/phpBB/styles/prosilver/template/simple_footer.html
index c968bf896f..f82742c3c9 100644
--- a/phpBB/styles/prosilver/template/simple_footer.html
+++ b/phpBB/styles/prosilver/template/simple_footer.html
@@ -25,7 +25,7 @@
 		<a href="#" class="alert_close">
 			<i class="icon fa-times-circle fa-fw" aria-hidden="true"></i>
 		</a>
-		<h3 class="alert_title"></h3><p class="alert_text"></p>
+		<h3 class="alert_title">&nbsp;</h3><p class="alert_text"></p>
 	</div>
 	<div id="phpbb_confirm" class="phpbb_confirm phpbb_alert">
 		<a href="#" class="alert_close">