Applying *overflow:visible to button/input causes text inputs to
grow to fit their content, even if an explicit, fixed width is
applied. It was originally included to remove excess inner
spacing on buttons and submit/reset/button-type inputs in IE6/7.
Fixing this bug in IE6 requires dropping the fix entirely because
there is no way to avoid it being applied to text inputs. If
there is a need to fix this excess spacing bug in IE6, then it
should be done using a class that is applied to the
necessary elements.
For IE7, the excess spacing fix can be moved into the ruleset
that targets button and submit/reset/button-type inputs. This
prevents text inputs from growing.
