PayPal Express Checkout: Download ipn_main_handler.php

[rhutchison]

Problem:
When using PayPal Express the customer is asked to download "ipn_main_handler.php" after clicking on the "Checkout with PayPal" button. Whether that file is saved or the download is cancelled, progress is stopped in the checkout process (customer is not sent to PayPal site).

PayPal IPN appears to function normally.

Action Taken:
I've looked through the forums for similar behaviors, but not found it. I've rechecked my cURL settings (hosted on GoDaddy Linux Hosting) based on the Wiki entry and forum postings. The March 21st PayPal patch has been applied.

Cart Configuration:
URL: http://www.patiotoys.com (GoDaddy-issued SSL installed)
Ver: 1.3.7 (new install)
Installed Contributions:

• About_Us
• Captcha_TTF (disabled)
• Column_Layout_Grid
• GoogleAnalytics
• hideCategories
• IH2
• PayPal_Verified_Logo (disabled)
• Zen_Lightbox

Relevant Modules:

• freeshipper (ON - all other shipping modules OFF)
• paypal (ON)
• paypalwpp (ON)

Logs:
(attached)

Comments:
The gist of other posts suggests that the reliable option is to go with hosting other than GoDaddy. That is certainly on the table, but would rather put the time into something other than transferring to a new hosting company.

Any other suggestions?

-Roger