60 chars was too little, 100 chars seems better. For me.

lib/default.php

@@ -153,6 +153,9 @@ $default =
               'dir' => null,
               'path'=> null,
               'ssl' => null),
+        'usertheme' =>
+        array('linkcolor' => 'black',
+              'backgroundcolor' => 'black'),
         'theme_upload' =>
         array('enabled' => extension_loaded('zip')),
         'javascript' =>
@@ -340,7 +343,7 @@ $default =
               'external' => 'sometimes'), // Options: 'sometimes', 'never', default = 'sometimes'
         'url' =>
         array('shortener' => 'internal',
-              'maxlength' => 60,
+              'maxlength' => 100,
               'maxnoticelength' => -1),
         'http' => // HTTP client settings when contacting other sites
         array('ssl_cafile' => false, // To enable SSL cert validation, point to a CA bundle (eg '/usr/lib/ssl/certs/ca-certificates.crt')