What do you do? You use the text indent property:

text-indent:-6000px; overflow:hidden; cursor:pointer;

Have you checked IE7? If the text is still there, try this:

color: transparent; text-transform: capitalize;

Yes, it is a hack, but it works great. And yes, you do have to have the capitalize transform or else it won’t work.

Here is everything you need to get your super awesome usable sprites working across all browsers:

.mybutton{background:transparent url(”mybackground.png”) 0 0 no-repeat; border:none;  text-indent:-6000px; overflow:hidden; cursor:pointer; color: transparent; text-transform: capitalize;}
have fun!