[checkout by email] Limit on items?

I asked this in the "big thread" but I think it may get lost so I am starting a new topic.

I am trying to get the checkout by email to work as that's the way I need to sell images instead of paypal since I offer coupons.

If more than about 20 items are placed in the cart and then an attempt to checkout by email is made I get the following error:

Warning: array_keys(): The first argument should be an array in /home/.eros/pnwimage/www.weddings.pnwimages.com/gallery/modules/checkoutemail/Email.inc on line 95
Security Violation

The action you attempted is not permitted.

Back to the Gallery
Error Detail -
Error (ERROR_BAD_PARAMETER)

* in modules/core/classes/helpers/GalleryDerivativeHelper_medium.class at line 48 (gallerycoreapi::error)
* in modules/core/classes/GalleryCoreApi.class at line 1013 (galleryderivativehelper_medium::fetchthumbnailsbyitemids)
* in modules/checkoutemail/Email.inc at line 95 (gallerycoreapi::fetchthumbnailsbyitemids)
* in main.php at line 199 (emailcontroller::handlerequest)
* in main.php at line 87
* in main.php at line 80

System Information
Gallery version 2.1
PHP version 4.4.2 cgi
Webserver Apache/1.3.33 (Unix) mod_throttle/3.1.2 DAV/1.0.3 mod_fastcgi/2.4.2 mod_gzip/1.3.26.1a PHP/4.4.2 mod_ssl/2.8.22 OpenSSL/0.9.7e
Database mysql 5.0.18-standard-log
Toolkits ImageMagick, SquareThumb, NetPBM, Gd
Operating system Linux olive 2.4.29-grsec+w+fhs6b+gr0501+nfs+a32+++p4+sata+c4+gr2b-v6.189 #1 SMP Mon Feb 7 13:23:30 PST 2005 i686
Browser Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.4) Gecko/20060508 Firefox/1.5.0.4

I have turned off thumbnails in the email but it still gets this error. Does anyone have a solution? If not, is there any other module that will allow checking out through email?