UI button widget padding

UI button widget padding

Hi,

Is there a reason why the UI theme roller provides extra padding to dialog box buttons with the following line?

.ui-dialog .ui-dialog-buttonpane button { float: right; margin: .5em .4em .5em 0; cursor: pointer; padding: .2em .6em .3em .6em; line-height: 1.4em; width:auto; overflow:visible; }

It makes the dialog buttons noticiably bigger than other regular UI buttons.

Thank you!
-DW