The problem is it takes over the session of other plugins that use sessions.
I have the fix to make compatible with "Fast and Secure Contact Form", a plugin that uses sessions for the CAPTCHA.
http://wordpress.org/extend/plugins/si-contact-form/
edit:
inline-editor.php
look in function InlineEditor()
on line 49 delete: $_SESSION['ile']['filter'] = true;
look in function init()
on line 295 add:
if( !isset( $_SESSION ) ) { // play nice with other plugins
session_cache_limiter ('private, must-revalidate');
session_start();
}
$_SESSION['ile']['filter'] = true;
...also, all the PHP files should have a closing PHP tag and they don't