My client has been getting this error for a few weeks. We contacted paypal and here is the error (a 302 error):

Message ID1EM969189A884674W
Date/time created3/9/2010 17:34 PST
Original/ResentOriginal
Latest delivery attempt date/time3/13/2010 15:06 PST Notification URLhttp://handsfreebaby.com/store/index.php?main_page=checkout_process
HTTP response code
What's this?302
Delivery statusFailed
No. of retries16
Transaction ID5XK84813J9639310B
IPN typeTransaction made
IPN
Messagemc_gross=76.10&protection_eligibility=Eligible&address_status=confirm
ed&payer_id=MP8DA73T8D66C&address_street=1808 Bonner
St&payment_date=17:34:58 Mar 09, 2010
PST&payment_status=Completed&charset=windows-1252&address_zip=75069&first_na
me=Edward&mc_fee=2.51&address_country_code=US&address_name=Gretchen
Carel&notify_version=2.9&payer_status=verified&business=karen@handsfreebaby.
com&address_country=United
States&address_city=McKinney&verify_sign=A-RGKUGRzjasNm7Hothd-rb8TVxsAIhItLu
OL9zt2b6tKTkI4oSbjf8p&payer_email=integrityremodeling##########################& txn_id=5XK
84813J9639310B&payment_type=instant&last_name=Carel&address_state=TX&receive
[email protected]&payment_fee=2.51&receiver_id=ZTD2MA9XNFNQN&t
xn_type=send_money&mc_currency=USD&residence_country=US&transaction_subject=
PayPal money request from Hands Free Baby&payment_gross=76.10

Spoke to host (lunarpages.com) and they said:

An HTTP code 302 means that the request that was entered into the address bar was redirected to another location. Please note that only 4xx and 5xx response codes indicate an error in the request or on the server. 2xx and 3xx status codes indicate that the request was received without issue and was responded to without issue.

Lunarpages goes on to say to contact Zen-cart for resolution as it is not a hosting issue. Our settings haven't changed. Can you please help?

Thanks,
Jill