Paypal IPN not updating payment status

Sorry for my english...

I had also some problems with paypal / ipn.

I'm using drupal 5.3 and ecommerce 5.x-3.5

3 points are important: IPN URL + activate IPN on paypal + patch paypal.module

First, I found that I forgot to tell paypal which is my ipn url callback, that could be done :
a) in your drupal's admin /admin/ecsettings/paypal, see PayPal IPN "request back" validation URL : and enter something like http://www.mywebsite.com/paypal/ipn

b) or directly inside your paypal account, search in IPN in your preferences, and set the IPN URL like above

ANYWAY, you must activate IPN in your paypal account, on the same page (IPN preferences)

And, I found also a bug in the paypal.module in function paypal_ipn :

$ipnrb = parse_url(variable_get('paypal_ipnrb_url', 'http://www.paypal.com/cgi-bin/webscr'));

the problem is that the variable paypal_ipnrb_url may be http://www.mywebsite.com/paypal/ipn if you choosed the a) method ... and then the function will LOOP again and again, and never post the request to paypal

I replaced this line with : $ipnrb = parse_url('https://www.paypal.com/cgi-bin/webscr');

Two small bugs again :

1- when sending ec_paypal_debug email, the last parameter should be an array

2- this line :
$is_new = (db_result(db_query("SELECT COUNT(txnid) FROM {ec_paypal} WHERE ppid = d", $ppid))) ? false : true;

should be :
$is_new = (db_result(db_query("SELECT COUNT(txnid) FROM {ec_paypal} WHERE ppid = '%s'", $ppid))) ? false : true;

because ppid is a varchar in the table