My image IDs look like these: image_sales, image_support, etc. Whenever I popup image's properties dialog and try to edit any of the fields it gives me "IDs can contain only letters and numbers, and must not contain spaces." error. According to:
http://www.w3.org/TR/html4/types.html#type-id
underscore is a valid ID character.
Is there a way to customize the validation of the inputs or at least make it ignore this error?
Thanks.