ALT attribute of Valid HTML icon

It strikes me that version 0.7.0 of the validator now has
*three different* ALT texts for *one* image, namely

 alt="Valid HTML 4.01 Frameset"
 alt="Valid HTML 4.01 Strict"
 alt="Valid HTML 4.01 Transitional"
     (And the "!" is gone.)

The icon itself has no such distinction.
http://www.w3.org/Icons/valid-html401