HTML markup in error message from exception from schema.inc

Hi,

This is probably a duplicate, but I couldn't find anything, so here I go:

While upgrading one of my modules to Drupal7, I had a bug with trying to create some tables two times.
In the resulting error message, there was some escaped markup (I replaced the angle brackets with square brackets to avoid markup munging):
DatabaseSchemaObjectExistsException: Table [em class="placeholder"]captcha_points[/em] already exists. in DatabaseSchema->createTable() (line 605 of /path/to/includes/database/schema.inc).
also see attached screenshot

FYI, the code referred to in the error message is:

   if ($this->tableExists($name)) {
      throw new DatabaseSchemaObjectExistsException(t('Table %name already exists.', array('%name' => $name)));
    }