Fixed. See screenshot-02. When component is disabled, style class of image button changed. That style class didn't have any CSS (incl. background image) assigned in any CSS file.
Revision: 22415
Modified : /icefaces/trunk/icefaces/core/src/com/icesoft/faces/resources/css/rime/rime-portlet.css
Modified : /icefaces/trunk/icefaces/core/src/com/icesoft/faces/resources/css/rime/rime.css
Modified : /icefaces/trunk/icefaces/core/src/com/icesoft/faces/resources/css/royale/royale.css
Modified : /icefaces/trunk/icefaces/core/src/com/icesoft/faces/resources/css/woodstock/woodstock.css
Modified : /icefaces/trunk/icefaces/core/src/com/icesoft/faces/resources/css/xp/xp-portlet.css
Modified : /icefaces/trunk/icefaces/core/src/com/icesoft/faces/resources/css/xp/xp.css
Revision: 22416
Modified : /icefaces2/trunk/icefaces/compat/core/src/main/resources/css/com/icesoft/faces/resources/css/rime/rime-portlet.css
Modified : /icefaces2/trunk/icefaces/compat/core/src/main/resources/css/com/icesoft/faces/resources/css/rime/rime.css
Modified : /icefaces2/trunk/icefaces/compat/core/src/main/resources/css/com/icesoft/faces/resources/css/royale/royale.css
Modified : /icefaces2/trunk/icefaces/compat/core/src/main/resources/css/com/icesoft/faces/resources/css/xp/xp-portlet.css
Modified : /icefaces2/trunk/icefaces/compat/core/src/main/resources/css/com/icesoft/faces/resources/css/xp/xp.css
Same problem in component showcase trunk. See screenshot-01. Therefore it is not a regression.