diff -up Tiny-Tiny-RSS-842c2ab4511d4feb65f295340137aebf424523a3/install/index.php.configpath Tiny-Tiny-RSS-842c2ab4511d4feb65f295340137aebf424523a3/install/index.php
--- Tiny-Tiny-RSS-842c2ab4511d4feb65f295340137aebf424523a3/install/index.php.configpath	2013-03-30 14:44:22.000000000 +0100
+++ Tiny-Tiny-RSS-842c2ab4511d4feb65f295340137aebf424523a3/install/index.php	2013-03-30 16:23:01.023661204 +0100
@@ -398,7 +398,7 @@
 				$DB_PORT, $SELF_URL_PATH);
 			print "</textarea>"; ?>
 
-			<?php if (is_writable("..")) { ?>
+			<?php if (is_writable("/etc/tt-rss/")) { ?>
 				<p>We can also try saving the file automatically now.</p>
 
 				<p><input type="submit" value="Save configuration"></p>