I created a custom skin starting with the SiteFinity skin. Everything works as expected except for the dropdown on the splitbutton. It has a black border instead of the rounded corners like the sitefinity skin. Not sure what I'm missing.
/* <RadToolBar / Custom> *//* <tool wrapper> *//* <horizontal> *//*.RadToolBar_Custom .rtbOuter{ border: 1px solid #e8e8e8;}*/.RadToolBar_Custom .rtbMiddle{ background: transparent;}/* </horizontal> *//* </tool wrapper> *//* <buttons> */div.RadToolBar_Custom_Horizontal .rtbItem{ margin: 0 3px;}div.RadToolBar_Custom_Vertical .rtbItem{ margin: 3px 0;}div.RadToolBar_Custom_Vertical .rtbSeparator{ width: 30px;}.RadToolBar_Custom .rtbWrap,.RadToolBar_Custom .rtbTemplate{ color: #333333; font: normal 12px/19px "Segoe UI", Arial, Helvetica, sans-serif;}div.RadToolBar_Custom .rtbMid{ padding: 0 5px 5px 0;}div.RadToolBar_Custom .rtbIn{ padding: 2px 0 0 5px; overflow: hidden;}div.RadToolBar_Custom .rtbIcon{ padding: 0 2px;}div.RadToolBar_Custom .rtbChoiceArrow{ height: 16px;}div.RadToolBar_Custom .rtbVOriented .rtbChoiceArrow{ margin-top: -7px;}/* <button states> */.RadToolBar_Custom .rtbItem .rtbWrap, .RadToolBar_Custom .rtbItem .rtbOut, .RadToolBar_Custom .rtbItem .rtbMid, .RadToolBar_Custom .rtbItem .rtbIn{ background-image: url('ToolBar/rtbNormalBg.png'); background-color: transparent; background-repeat: no-repeat;}* html .RadToolBar_Custom .rtbItem .rtbWrap, * html .RadToolBar_Custom .rtbItem .rtbOut, * html .RadToolBar_Custom .rtbItem .rtbMid, * html .RadToolBar_Custom .rtbItem .rtbIn{ background-image: url('ToolBar/rtbNormalBgIE6.png');}.RadToolBar_Custom .rtbSplBtnFocused .rtbWrap, .RadToolBar_Custom .rtbSplBtnFocused .rtbOut, .RadToolBar_Custom .rtbSplBtnFocused .rtbMid, .RadToolBar_Custom .rtbSplBtnFocused .rtbIn,.RadToolBar_Custom .rtbItemFocused .rtbWrap, .RadToolBar_Custom .rtbItemFocused .rtbOut, .RadToolBar_Custom .rtbItemFocused .rtbMid, .RadToolBar_Custom .rtbItemFocused .rtbIn,.RadToolBar_Custom .rtbItemHovered .rtbWrap, .RadToolBar_Custom .rtbItemHovered .rtbOut, .RadToolBar_Custom .rtbItemHovered .rtbMid, .RadToolBar_Custom .rtbItemHovered .rtbIn{ background-color: transparent; background-repeat: no-repeat; background-image: url('ToolBar/rtbHoverBg.png');}* html .RadToolBar_Custom .rtbSplBtnFocused .rtbWrap, * html .RadToolBar_Custom .rtbSplBtnFocused .rtbOut, * html .RadToolBar_Custom .rtbSplBtnFocused .rtbMid, * html .RadToolBar_Custom .rtbSplBtnFocused .rtbIn,* html .RadToolBar_Custom .rtbItemFocused .rtbWrap, * html .RadToolBar_Custom .rtbItemFocused .rtbOut, * html .RadToolBar_Custom .rtbItemFocused .rtbMid, * html .RadToolBar_Custom .rtbItemFocused .rtbIn,* html .RadToolBar_Custom .rtbItemHovered .rtbWrap, * html .RadToolBar_Custom .rtbItemHovered .rtbOut, * html .RadToolBar_Custom .rtbItemHovered .rtbMid, * html .RadToolBar_Custom .rtbItemHovered .rtbIn{ background-image: url('ToolBar/rtbHoverBgIE6.png');}.RadToolBar_Custom .rtbItemClicked .rtbWrap, .RadToolBar_Custom .rtbItemClicked .rtbOut, .RadToolBar_Custom .rtbItemClicked .rtbMid, .RadToolBar_Custom .rtbItemClicked .rtbIn,.RadToolBar_Custom .rtbSplBtnExpanded .rtbWrap, .RadToolBar_Custom .rtbSplBtnExpanded .rtbOut, .RadToolBar_Custom .rtbSplBtnExpanded .rtbMid, .RadToolBar_Custom .rtbSplBtnExpanded .rtbIn,.RadToolBar_Custom .rtbDropDownExpanded .rtbWrap, .RadToolBar_Custom .rtbDropDownExpanded .rtbOut, .RadToolBar_Custom .rtbDropDownExpanded .rtbMid, .RadToolBar_Custom .rtbDropDownExpanded .rtbIn,.RadToolBar_Custom .rtbChecked .rtbWrap, .RadToolBar_Custom .rtbChecked .rtbOut, .RadToolBar_Custom .rtbChecked .rtbMid, .RadToolBar_Custom .rtbChecked .rtbIn{ background-image: url('ToolBar/rtbActiveBg.png'); background-color: transparent; background-repeat: no-repeat;}* html .RadToolBar_Custom .rtbItemClicked .rtbWrap, * html .RadToolBar_Custom .rtbItemClicked .rtbOut, * html .RadToolBar_Custom .rtbItemClicked .rtbMid, * html .RadToolBar_Custom .rtbItemClicked .rtbIn,* html .RadToolBar_Custom .rtbSplBtnExpanded .rtbWrap, * html .RadToolBar_Custom .rtbSplBtnExpanded .rtbOut, * html .RadToolBar_Custom .rtbSplBtnExpanded .rtbMid, * html .RadToolBar_Custom .rtbSplBtnExpanded .rtbIn,* html .RadToolBar_Custom .rtbDropDownExpanded .rtbWrap, * html .RadToolBar_Custom .rtbDropDownExpanded .rtbOut, * html .RadToolBar_Custom .rtbDropDownExpanded .rtbMid, * html .RadToolBar_Custom .rtbDropDownExpanded .rtbIn,* html .RadToolBar_Custom .rtbChecked .rtbWrap, * html .RadToolBar_Custom .rtbChecked .rtbOut, * html .RadToolBar_Custom .rtbChecked .rtbMid, * html .RadToolBar_Custom .rtbChecked .rtbIn{ background-image: url('ToolBar/rtbActiveBgIE6.png');}.RadToolBar_Custom .rtbItemFocused .rtbWrap,.RadToolBar_Custom .rtbChecked .rtbWrap,.RadToolBar_Custom .rtbDropDownExpanded .rtbWrap,.RadToolBar_Custom .rtbSplBtnExpanded .rtbWrap,.RadToolBar_Custom .rtbItemHovered .rtbWrap,.RadToolBar_Custom .rtbItemClicked .rtbWrap{ color: #000000;}/* </button states> *//* <Drop Down Arrows> */.RadToolBar_Custom .rtbSplBtn .rtbChoiceArrow,.RadToolBar_Custom .rtbItem .rtbVOriented .rtbChoiceArrow,.RadToolBar_Custom .rtbChoiceArrow { background-image: url('ToolBar/rtbDropArrows.png');}.RadToolBar_Custom .rtbExpandUp .rtbChoiceArrow,.RadToolBar_Custom .rtbExpandUp .rtbVOriented .rtbChoiceArrow{ background-image: url('ToolBar/rtbUpArrows.png');}.RadToolBar_Custom .rtbSplBtnExpanded .rtbVOriented .rtbChoiceArrow,.RadToolBar_Custom .rtbSplBtnExpanded .rtbChoiceArrow,.RadToolBar_Custom .rtbDropDownExpanded .rtbVOriented .rtbChoiceArrow,.RadToolBar_Custom .rtbDropDownExpanded .rtbChoiceArrow,.RadToolBar_Custom .rtbSplBtnHovered .rtbVOriented .rtbChoiceArrow,.RadToolBar_Custom .rtbSplBtnHovered .rtbChoiceArrow,.RadToolBar_Custom .rtbItemHovered .rtbVOriented .rtbChoiceArrow,.RadToolBar_Custom .rtbItemHovered .rtbChoiceArrow,.RadToolBar_Custom .rtbSplBtnClicked .rtbVOriented .rtbChoiceArrow,.RadToolBar_Custom .rtbSplBtnClicked .rtbChoiceArrow,.RadToolBar_Custom .rtbItemClicked .rtbVOriented .rtbChoiceArrow,.RadToolBar_Custom .rtbItemClicked .rtbChoiceArrow{ background-color: transparent; background-image: url('ToolBar/rtbHoverDropArrows.png'); background-repeat: no-repeat;}.RadToolBar_Custom .rtbSplBtnExpanded .rtbExpandUp .rtbChoiceArrow,.RadToolBar_Custom .rtbDropDownExpanded .rtbExpandUp .rtbChoiceArrow,.RadToolBar_Custom .rtbSplBtnHovered .rtbExpandUp .rtbChoiceArrow,.RadToolBar_Custom .rtbItemHovered .rtbExpandUp .rtbChoiceArrow,.RadToolBar_Custom .rtbSplBtnClicked .rtbExpandUp .rtbChoiceArrow,.RadToolBar_Custom .rtbItemClicked .rtbExpandUp .rtbChoiceArrow{ background-image: url('ToolBar/rtbHoverUpArrows.png');}/* </Drop Down Arrows> */.RadToolBar_Custom_Horizontal li.rtbSeparator { border-left: 1px solid #474747; background: #a1a1a1;}.RadToolBar_Custom_Vertical li.rtbSeparator{ border-top: 1px solid #474747; background: #a1a1a1;}* html .RadToolBar_Custom .rtbSplBtnActivator { margin-top /**/: 2px; } /* IE Quirksmode hack */*+html div.RadToolBar_Custom .rtbIn { vertical-align: top; }* html div.RadToolBar_Custom .rtbIn { vertical-align: top; }*+html div.RadToolBar_Custom .rtbIn * { vertical-align: middle; }* html div.RadToolBar_Custom .rtbIn * { vertical-align: middle; }/* </buttons> *//* <disabled states> */.RadToolBar_Custom .rtbDisabled .rtbWrap, .RadToolBar_Custom .rtbDisabled .rtbOut, .RadToolBar_Custom .rtbDisabled .rtbMid, .RadToolBar_Custom .rtbDisabled .rtbIn,.RadToolBar_Custom .rtbDisabled .rtbWrap:hover,.RadToolBar_Custom .rtbDisabled .rtbWrap:hover .rtbOut,.RadToolBar_Custom .rtbDisabled .rtbWrap:hover .rtbMid,.RadToolBar_Custom .rtbDisabled .rtbWrap:hover .rtbIn{ background-image: url('ToolBar/rtbDisabledBg.png'); background-color: transparent; background-repeat: no-repeat;}* html .RadToolBar_Custom .rtbDisabled .rtbWrap, * html .RadToolBar_Custom .rtbDisabled .rtbOut, * html .RadToolBar_Custom .rtbDisabled .rtbMid, * html .RadToolBar_Custom .rtbDisabled .rtbIn,* html .RadToolBar_Custom .rtbDisabled .rtbWrap:hover,* html .RadToolBar_Custom .rtbDisabled .rtbWrap:hover .rtbOut,* html .RadToolBar_Custom .rtbDisabled .rtbWrap:hover .rtbMid,* html .RadToolBar_Custom .rtbDisabled .rtbWrap:hover .rtbIn{ background-image: url('ToolBar/rtbDisabledBgIE6.png');}.RadToolBar_Custom .rtbDisabled .rtbWrap { color: #999999; }/* Opacity hack for IE */.RadToolBar .rtbDisabled .rtbIcon,.RadToolBar .rtbDisabled .rtbChoiceArrow { filter: alpha(opacity=40)\9; -ms-filter: "alpha(opacity=40)"\9;}div.RadToolBar .rtbDisabled { opacity: 1; -moz-opacity: 1 }.RadToolBar .rtbDisabled .rtbIcon,.RadToolBar .rtbDisabled .rtbChoiceArrow { -moz-opacity: .4; opacity: .4; }/* </disabled states> *//* <background positions> */.RadToolBar .rtbItem .rtbWrap { background-position: 0 100%; }.RadToolBar .rtbItem .rtbOut { background-position: 100% 0; }.RadToolBar .rtbItem .rtbMid { background-position: 100% 100%; }.RadToolBar .rtbItem .rtbIn { background-position: 0 0; }.RadToolBar .rtbDisabled .rtbWrap { background-position: 0 100%; }.RadToolBar .rtbDisabled .rtbOut { background-position: 100% 0; }.RadToolBar .rtbDisabled .rtbMid { background-position: 100% 100%; }.RadToolBar .rtbDisabled .rtbIn { background-position: 0 0; }/* </background positions> *//* <drop-down> *//* <Drop Down rounded corners and shadows> */.RadToolBarDropDown_Custom .rtbTopFix,.RadToolBarDropDown_Custom .rtbBottomFix,.RadToolBarDropDown_Custom .rtbGroup{ background-color: #ffffff; /*background-repeat: repeat-y; background-image:none !important;*/}.RadToolBarDropDown_Custom .rtbBottomLeft,.RadToolBarDropDown_Custom .rtbRoundedCorners{ background-image: url('ToolBar/rtbRoundedLeft.png'); background-color: transparent; background-repeat: no-repeat;}.RadToolBarDropDown_Custom .rtbTopRight,.RadToolBarDropDown_Custom .rtbBottomRight{ background-image: url('ToolBar/rtbRoundedRight.png'); background-color: transparent; background-repeat: no-repeat;}.RadToolBarDropDown_Custom div.rtbTopFix,.RadToolBarDropDown_Custom div.rtbBottomFix{ border: 0;}/* </Drop Down rounded corners and shadows> */div.RadToolBarDropDown_Custom{ border-color: #c4c4c4; background-color: #ffffff; }.RadToolBarDropDown_Custom .rtbWrap,.RadToolBarDropDown_Custom .rtbTemplate{ color: #b5b5b5; font: normal 12px/19px "Segoe UI", Arial, Helvetica, sans-serif !important; }.RadToolBarDropDown_Custom .rtbItemHovered,.RadToolBarDropDown_Custom .rtbItemHovered .rtbWrap{ text-decoration: underline;}.RadToolBarDropDown_Custom .rtbItemFocused,.RadToolBarDropDown_Custom .rtbItemFocused .rtbWrap{ color: #000000;}.RadToolBarDropDown_Custom .rtbDisabled .rtbWrap{ color: #8a8a8a;}.RadToolBarDropDown_Custom .rtbSeparator{ border-color: #c9c9c9; background: #ffffff;}.RadToolBarDropDown_Custom .rtbWrap { background-color:White !important; padding:3px !important; background-image:none !important; font: normal 12px/19px "Segoe UI", Arial, Helvetica, sans-serif !important; }/* </drop-down> *//* </RadToolBar / Custom> */