PHP Warning: Illegal string offset 'id'

I have searched the forum and am just not finding the needed fix. Zen Cart 1.5.1 and recently needed to upgrade from PHP 5.3.x TO 5.5.12 and am receiving the following PHP errors when :

PHP Warning:  Illegal string offset 'id' in ..\includes\classes\shipping.php on line 32
PHP Warning:  Illegal string offset 'id' in ..\includes\classes\shipping.php on line 32  //yes, this is the same as the first 
PHP Warning:  Illegal string offset 'id' in ..\includes\modules\order_total\ot_shipping.php on line 41
PHP Warning:  Illegal string offset 'id' in ..\estore\includes\modules\order_total\ot_shipping.php on line 41

This is happening when a user logs in when a virtual item only (software download) is in the cart. In the item setup under, "Product is virtual:" I have, "Yes, skip shipping address" marked AND "Always Free Shipping:" set to "No, Normal Shipping Rules"

Now, interesting thing is, when I change this to, "No, Shipping address Required"...I ONLY receive the following PHP error:

PHP Warning:  Illegal string offset 'title' in ..\includes\modules\pages\checkout_shipping\header_php.php on line 88

If I change it back to, "Yes, skip shipping address" I get the original set of errors. I can navigate my store just fine, add/remove products just fine and do just about everything except check out with a virtual product...

Environment:

Zen Cart: 1.5.1
PHP 5.5.12
Platform: Server 2008 R2, IIS 7.5

Update:

I'm also getting the illegal string offset 'id' in many other php files on test orders with regular products as well

That's because v1.5.1 isn't compatible with your PHP 5.5 version.
It's a bug only insomuch as v1.5.1 was written before PHP 5.5 ever existed.

Version compatibility: http://www.zen-cart.com/content.php?48-what-are-the-server-requirements-to-run-zen-cart
About v1.5.3 and PHP 5.4, 5.5, 5.6: http://www.zen-cart.com/showthread.php?213429-Upcoming-versions-1-5-3-and-1-6-0-compatible-with-PHP-5-4-5-5-5-6
About v1.5.2-beta: http://www.zen-cart.com/showthread.php?211146-Pre-release-notice-for-v1-5-2

My apologies for wasting your time. Newer to ZC and just found these issues are being addressed in the upcoming releases. I did find the Github pulls that address all the files in question. I'll see if I can patch until the next version is released.

Nettric:

My apologies for wasting your time.No harm done.
Nettric:

Newer to ZCWelcome to the family :)
Nettric:

and just found these issues are being addressed in the upcoming releases. Thumbs up :thumbsup: