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.