Note: this list is generated by looking for the string for this theme hook, so it may include some references that are not actually using this theme hook.

block-admin-display-form.tpl.php in modules/block/block-admin-display-form.tpl.php
block-admin-display-form.tpl.php Default theme implementation to configure blocks.
block_add_block_form in modules/block/block.admin.inc
Menu callback: display the custom block addition form.
block_admin_configure in modules/block/block.admin.inc
Menu callback; displays the block configuration form.
block_admin_configure_submit in modules/block/block.admin.inc
block_admin_display_form in modules/block/block.admin.inc
Generate main blocks administration form.
drupal_common_theme in includes/common.inc
Provide theme registration for themes across .inc files.
drupal_required_modules in includes/module.inc
Array of modules required by core.
system_install in modules/system/system.install
Implementation of hook_install().
_block_rehash in modules/block/block.module
Update the 'blocks' DB table with the blocks currently exported by modules.