with the fix of http://tracker.zkoss.org/browse/ZK-1433 an inline style was added to a macro component. Those styles are hard to override by CSS and requiring "!important" breaking the way CSS styles work in a normal scenario.

WORKAROUNDS
<style>
.z-macro

{ display: initial !important; min-width: initial !important; }

</style>

OR

use inline-macros