Fatal error in the Image test

Environment:

goDaddy economy shared hosting,

PHP 4.3.11: './configure' '--with-cgi' '--enable-fastcgi' '--with-config-file-path=/web/conf' '--with-gd' '--with-xml' '--with-gettext' '--with-zlib-dir=/usr/src/zlib' '--disable-posix' '--with-jpeg-dir=../jpeg-6b' '--enable-gd-native-ttf' '--enable-ftp' '--with-freetype-dir=/usr' '--with-freetype' '--with-sybase=/usr/src/freetds' '--with-curl=/usr/bin/curl' '--with-dom' '--enable-calendar' '--enable-soap' '--enable-bcmath' '--with-zip' '--with-openssl' '--with-mcrypt' '--with-mysql=/usr/local/mysql-5.0'

GD is available, ImageMagik is NOT.
MySQL 5.0.45 (NOT on localhost).
sinpletest library: 1.0.1beta2

NO PATCHES APPLIED.

Drupal 5.3: Drupal Core, Comment, Contact, Help, Menu, Path, Profile, Search, Taxonomy, Upload;

Image, Image Attach, Image Gallery, Image Import: 5.x-1.6

SimpleTest 5.x-1.0

When I run Image test ONLY (or in conjunction with others) It breaks and throws up an error into the browser:
Fatal error: Call to undefined function: strripos() in /home/content/a/n/s/answerjam/html/test/sites/all/modules/simpletest/tests/image_module.test on line 108

Unfortunately my access to the logs and system guts is severely limited (goDaddy economy hosting). But, since this is my test environment, I can patch the PHP code any way you tell me :-)