diff --git a/html/inc/boinc_db.inc b/html/inc/boinc_db.inc
index f5868fddc63..eb4d91e9295 100644
--- a/html/inc/boinc_db.inc
+++ b/html/inc/boinc_db.inc
@@ -143,6 +143,7 @@ class BoincDb extends DbConn {
     }
 
     static function escape_string($string) {
+        if (!$string) return '';
         $db = self::get();
         return $db->base_escape_string(trim($string));
     }
diff --git a/html/inc/user.inc b/html/inc/user.inc
index cb0bc7e4bf9..26d6ba8bebb 100644
--- a/html/inc/user.inc
+++ b/html/inc/user.inc
@@ -249,11 +249,9 @@ function show_user_info_private($user) {
         }
         row2(tra("Email address"), $email_text);
     }
-    if (USER_URL) {
-        if ($user->url) {
-            $u = normalize_user_url($user->url);
-            row2(tra("URL"), sprintf('<a href="%s">%s</a>', $u, $u));
-        }
+    if (USER_URL && $user->url) {
+        $u = normalize_user_url($user->url);
+        row2(tra("URL"), sprintf('<a href="%s">%s</a>', $u, $u));
     }
     if (USER_COUNTRY) {
         row2(tra("Country"), $user->country);
@@ -461,14 +459,12 @@ function show_user_summary_public($user) {
     if (USER_COUNTRY) {
         row2(tra("Country"), $user->country);
     }
-    if (USER_URL) {
+    if (USER_URL && $user->url) {
         // don't show URL if user has no recent credit (spam suppression)
         //
-        if ($user->url) {
-            if (!NO_COMPUTING || $user->expavg_credit > 1) {
-                $u = normalize_user_url($user->url);
-                row2(tra("URL"), sprintf('<a href="%s">%s</a>', $u, $u));
-            }
+        if (!NO_COMPUTING || $user->expavg_credit > 1) {
+            $u = normalize_user_url($user->url);
+            row2(tra("URL"), sprintf('<a href="%s">%s</a>', $u, $u));
         }
     }
     if (!NO_COMPUTING) {
diff --git a/html/inc/util.inc b/html/inc/util.inc
index 7fd3d7f822b..cbfef28bc0c 100644
--- a/html/inc/util.inc
+++ b/html/inc/util.inc
@@ -443,17 +443,17 @@ function time_diff($x, $res=3) {
 
 function date_str($x) {
     if ($x == 0) return "---";
-    return gmdate('j M Y', $x);
+    return gmdate('j M Y', (int)$x);
 }
 
 function time_str($x) {
     if ($x == 0) return "---";
-    return gmdate('j M Y, G:i:s', $x) . " UTC";
+    return gmdate('j M Y, G:i:s', (int)$x) . " UTC";
 }
 
 function local_time_str($x) {
     if ($x == 0) return "---";
-    return date('j M Y, H:i T', $x);
+    return date('j M Y, H:i T', (int)$x);
 }
 
 function pretty_time_str($x) {
@@ -1034,13 +1034,10 @@ function sanitize_tags($x) {
 }
 
 function sanitize_numeric($x) {
-    if (is_numeric($x)) {
-        return $x;
-    } else if (trim($x) == '' ) {
+    if (!$x || !is_numeric($x)) {
         return '';
-    } else {
-        return "not numeric";
     }
+    return $x;
 }
 
 function sanitize_email($x) {
diff --git a/html/inc/xml.inc b/html/inc/xml.inc
index b6e289e17e1..7f2cf8e21e9 100644
--- a/html/inc/xml.inc
+++ b/html/inc/xml.inc
@@ -116,7 +116,7 @@ function show_user_xml($user, $show_hosts) {
     if (USER_COUNTRY) {
         echo "     <country>$user->country</country>\n";
     }
-    if (USER_URL) {
+    if (USER_URL && $user->url) {
         $url = normalize_user_url($user->url);
         echo "    <url>".htmlspecialchars($url)."</url>\n";
     }
@@ -126,7 +126,6 @@ function show_user_xml($user, $show_hosts) {
 function show_team_member($user, $creditonly = false) {
     if ($creditonly && !$user->total_credit) { return; }
     $cpid = md5($user->cross_project_id.$user->email_addr);
-    $url = normalize_user_url($user->url);
     echo "<user>
     <id>$user->id</id>
     <cpid>$cpid</cpid>
@@ -141,7 +140,7 @@ function show_team_member($user, $creditonly = false) {
         if (USER_COUNTRY) {
             echo "     <country>$user->country</country>\n";
         }
-        if (USER_URL) {
+        if (USER_URL && $user->url) {
             $url = normalize_user_url($user->url);
             echo "    <url>".htmlspecialchars($url)."</url>\n";
         }
diff --git a/html/user/server_status.php b/html/user/server_status.php
index 36bf33644ac..4c04766679f 100644
--- a/html/user/server_status.php
+++ b/html/user/server_status.php
@@ -113,57 +113,57 @@ function show_status_html($x) {
     $daemons = $x->daemons;
     start_table();
     echo "<tr><td>\n";
-            echo "
-                 <h3>".tra("Server status")."</h3>
-            ";
-            start_table('table-striped');
-            table_header(tra("Program"), tra("Host"), tra("Status"));
-            foreach ($daemons->local_daemons as $d) {
-                daemon_html($d);
-            }
-            foreach ($daemons->remote_daemons as $d) {
-                daemon_html($d);
-            }
-            foreach ($daemons->disabled_daemons as $d) {
-                daemon_html($d);
-            }
-            end_table();
+    echo "
+         <h3>".tra("Server status")."</h3>
+    ";
+    start_table('table-striped');
+    table_header(tra("Program"), tra("Host"), tra("Status"));
+    foreach ($daemons->local_daemons as $d) {
+        daemon_html($d);
+    }
+    foreach ($daemons->remote_daemons as $d) {
+        daemon_html($d);
+    }
+    foreach ($daemons->disabled_daemons as $d) {
+        daemon_html($d);
+    }
+    end_table();
 
-            if ($daemons->cached_time) {
-                echo "<br>Remote daemon status as of ", time_str($daemons->cached_time);
-            }
-            if ($daemons->missing_remote_status) {
-                echo "<br>Status of remote daemons is missing\n";
-            }
-            if (function_exists('server_status_project_info')) {
-                echo "<br>";
-                server_status_project_info();
-            }
+    if ($daemons->cached_time) {
+        echo "<br>Remote daemon status as of ", time_str($daemons->cached_time);
+    }
+    if ($daemons->missing_remote_status) {
+        echo "<br>Status of remote daemons is missing\n";
+    }
+    if (function_exists('server_status_project_info')) {
+        echo "<br>";
+        server_status_project_info();
+    }
     echo "</td><td>\n";
-            echo "<h3>".tra("Computing status")."</h3>\n";
-            echo "<h4>".tra("Work")."</h4>\n";
-            start_table('table-striped');
-            item_html("Tasks ready to send", $j->results_ready_to_send);
-            item_html("Tasks in progress", $j->results_in_progress);
-            item_html("Workunits waiting for validation", $j->wus_need_validate);
-            item_html("Workunits waiting for assimilation", $j->wus_need_assimilate);
-            item_html("Workunits waiting for file deletion", $j->wus_need_file_delete);
-            item_html("Tasks waiting for file deletion", $j->results_need_file_delete);
-            item_html("Transitioner backlog (hours)", number_format($j->transitioner_backlog, 2));
-            end_table();
-            echo "<h4>".tra("Users")."</h4>\n";
-            start_table('table-striped');
-            item_html("With credit", $j->users_with_credit);
-            item_html("With recent credit", $j->users_with_recent_credit);
-            item_html("Registered in past 24 hours", $j->users_past_24_hours);
-            end_table();
-            echo "<h4>".tra("Computers")."</h4>\n";
-            start_table('table-striped');
-            item_html("With credit", $j->hosts_with_credit);
-            item_html("With recent credit", $j->hosts_with_recent_credit);
-            item_html("Registered in past 24 hours", $j->hosts_past_24_hours);
-            item_html("Current GigaFLOPS", round($j->flops, 2));
-            end_table();
+    echo "<h3>".tra("Computing status")."</h3>\n";
+    echo "<h4>".tra("Work")."</h4>\n";
+    start_table('table-striped');
+    item_html("Tasks ready to send", $j->results_ready_to_send);
+    item_html("Tasks in progress", $j->results_in_progress);
+    item_html("Workunits waiting for validation", $j->wus_need_validate);
+    item_html("Workunits waiting for assimilation", $j->wus_need_assimilate);
+    item_html("Workunits waiting for file deletion", $j->wus_need_file_delete);
+    item_html("Tasks waiting for file deletion", $j->results_need_file_delete);
+    item_html("Transitioner backlog (hours)", number_format($j->transitioner_backlog, 2));
+    end_table();
+    echo "<h4>".tra("Users")."</h4>\n";
+    start_table('table-striped');
+    item_html("With credit", $j->users_with_credit);
+    item_html("With recent credit", $j->users_with_recent_credit);
+    item_html("Registered in past 24 hours", $j->users_past_24_hours);
+    end_table();
+    echo "<h4>".tra("Computers")."</h4>\n";
+    start_table('table-striped');
+    item_html("With credit", $j->hosts_with_credit);
+    item_html("With recent credit", $j->hosts_with_recent_credit);
+    item_html("Registered in past 24 hours", $j->hosts_past_24_hours);
+    item_html("Current GigaFLOPS", round($j->flops, 2));
+    end_table();
     echo "</td></tr>\n";
     end_table();
     echo "<h3>".tra("Tasks by application")."</h3>\n";
@@ -426,7 +426,12 @@ function get_job_status() {
             AND received_time > (unix_timestamp()-86400)
             "
         );
-        $app->info = $info;
+        // $info fields will be null if app has no results
+        if ($info->avg) {
+            $app->info = $info;
+        } else {
+            $app->info = null;
+        }
         $app->unsent = BoincResult::count("appid=$app->id and server_state=2");
         $app->in_progress = BoincResult::count("appid=$app->id and server_state=4");
     }