Error-Notice: funcion unserialize, in invite.controller.inc

Hi.

Today I updated the Invite module to version 7.x-4.x-dev, released on 2012-Dec-23.

I can see the following message in admin area of the site:

Notice: unserialize() [function.unserialize]: Error at offset 0 of 5 bytes em InviteType->__construct() (line 228 of C:\wamp\www\mysite\sites\all\modules\invite\includes\invite.controller.inc).

In line 228 of invite.controller.inc, we have:

$this->data = unserialize($this->data);

Also is other issue with invite_by_email.module here.

Any ideas?

Tks.