9 uses of WATCHDOG_ERROR in Drupal 4

drupal_convert_to_utf8 in includes/unicode.inc

Convert data to UTF-8

error_handler in includes/common.inc

Log errors as defined by administrator Error levels: 0 = Log errors to database. 1 = Log errors to database and to screen.

file_check_directory in includes/file.inc

Check that the directory exists and is writable. Directories need to have execute permissions to be considered a directory by FTP servers, etc.

file_copy in includes/file.inc

Copies a file to a new location. This is a powerful function that in many ways performs like an advanced version of copy().

filter_form_validate in modules/filter.module

image_toolkit_invoke in includes/image.inc

Invokes the given method using the currently selected toolkit.

user_pass_submit in modules/user.module

_form_validate in includes/form.inc

_locale_admin_import_submit in includes/locale.inc

Process the locale import form submission.