diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 54388fdd701..ce4f498869c 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -429,7 +429,7 @@ function GETPOST($paramname, $check='', $method=0, $filter=NULL, $options=NULL)
 	            break;
 	        case 'aZ09':
 	            $out=trim($out);
-	            if (preg_match('/[^a-z0-9_\-]+/i',$out)) $out='';
+	            if (preg_match('/[^a-z0-9_\-\.]+/i',$out)) $out='';
 	            break;
 	        case 'array':
 	            if (! is_array($out) || empty($out)) $out=array();
diff --git a/htdocs/install/check.php b/htdocs/install/check.php
index bc7082b8d9d..1bcc6fadaff 100644
--- a/htdocs/install/check.php
+++ b/htdocs/install/check.php
@@ -62,7 +62,7 @@ pHeader('','');     // No next step for navigation buttons. Next step is defined
 //print "<br>\n";
 //print $langs->trans("InstallEasy")."<br><br>\n";
 
-print '<h3>'.$langs->trans("MiscellaneousChecks").":</h3>\n";
+print '<h3><img class="valigntextbottom" src="../theme/common/octicons/lib/svg/gear.svg" width="20" alt="Database"> '.$langs->trans("MiscellaneousChecks").":</h3>\n";
 
 // Check browser
 $useragent=$_SERVER['HTTP_USER_AGENT'];
diff --git a/htdocs/install/step4.php b/htdocs/install/step4.php
index 740a45a9063..54d985597bc 100644
--- a/htdocs/install/step4.php
+++ b/htdocs/install/step4.php
@@ -69,7 +69,9 @@ if (! is_writable($conffile))
 }
 
 
-print '<br>'.$langs->trans("LastStepDesc").'<br><br>';
+print '<h3><img class="valigntextbottom" src="../theme/common/octicons/lib/svg/key.svg" width="20" alt="Database"> '.$langs->trans("DolibarrAdminLogin").'</h3>';
+
+print $langs->trans("LastStepDesc").'<br><br>';
 
 
 print '<table cellspacing="0" cellpadding="2" width="100%">';
@@ -78,7 +80,7 @@ $db=getDoliDBInstance($conf->db->type,$conf->db->host,$conf->db->user,$conf->db-
 
 if ($db->ok)
 {
-    print '<tr><td>'.$langs->trans("DolibarrAdminLogin").' :</td><td>';
+    print '<tr><td>'.$langs->trans("Login").' :</td><td>';
 	print '<input name="login" type="text" value="' . (!empty($_GET["login"]) ? GETPOST("login") : (isset($force_install_dolibarrlogin) ? $force_install_dolibarrlogin : '')) . '"' . (@$force_install_noedit == 2 && $force_install_dolibarrlogin !== null ? ' disabled' : '') . '></td></tr>';
     print '<tr><td>'.$langs->trans("Password").' :</td><td>';
     print '<input type="password" name="pass"></td></tr>';
diff --git a/htdocs/install/step5.php b/htdocs/install/step5.php
index 28594c0e6c4..4afe2e4a722 100644
--- a/htdocs/install/step5.php
+++ b/htdocs/install/step5.php
@@ -47,8 +47,8 @@ if (! empty($action) && preg_match('/upgrade/i', $action))	// If it's an old upg
     $tmp=explode('_', $action, 2);
     if ($tmp[0]=='upgrade')
     {
-        //if (! empty($tmp[1])) $targetversion=$tmp[1];
-        $targetversion=$versionto;
+        if (! empty($tmp[1])) $targetversion=$tmp[1];   // if $action = 'upgrade_6.0.0-beta', we use '6.0.0-beta'
+        else $targetversion=DOL_VERSION;                // if $action = 'upgrade', we use DOL_VERSION
     }
 }
 
diff --git a/htdocs/install/upgrade.php b/htdocs/install/upgrade.php
index e7cb6f46d71..edd6463482f 100644
--- a/htdocs/install/upgrade.php
+++ b/htdocs/install/upgrade.php
@@ -106,7 +106,7 @@ if (! GETPOST('action','aZ09') || preg_match('/upgrade/i',GETPOST('action','aZ09
 {
     $actiondone=1;
 
-    print '<h3>'.$langs->trans("DatabaseMigration").'</h3>';
+    print '<h3><img class="valigntextbottom" src="../theme/common/octicons/lib/svg/database.svg" width="20" alt="Database"> '.$langs->trans("DatabaseMigration").'</h3>';
 
     print '<table cellspacing="0" cellpadding="1" border="0" width="100%">';
     $error=0;
diff --git a/htdocs/install/upgrade2.php b/htdocs/install/upgrade2.php
index 79b6df8d14f..2c032ffa7c0 100644
--- a/htdocs/install/upgrade2.php
+++ b/htdocs/install/upgrade2.php
@@ -106,7 +106,7 @@ pHeader('','step5',GETPOST('action','aZ09')?GETPOST('action','aZ09'):'upgrade','
 
 if (! GETPOST('action','aZ09') || preg_match('/upgrade/i',GETPOST('action','aZ09')))
 {
-    print '<h3>'.$langs->trans('DataMigration').'</h3>';
+    print '<h3><img class="valigntextbottom" src="../theme/common/octicons/lib/svg/database.svg" width="20" alt="Database"> '.$langs->trans('DataMigration').'</h3>';
 
     print '<table cellspacing="0" cellpadding="1" border="0" width="100%">';