Visual regressions in RadSplitter: [Lightweight] [IE-all] [All-Skins] vertical sliding panes tab text is upside down now: https://www.screencast.com/t/GhdIru4Od2sU [Classic] [all-browsers] [BlackMetroTouch,MetroTouch] - missing SlidingPane icons - https://www.screencast.com/t/qc18E9vU7MSF [Classic] [all-browsers] [Metro, MetroTouch] - missing backgrounds in the entire splitter: https://www.screencast.com/t/MBjdwph1wcW [Classic] [all-browsers] [All-Skins] - missing active sliding pane effect (expected: https://www.screencast.com/t/lFAnFdyzwNRU , actual: https://www.screencast.com/t/jyDdWJHIa10 ) [Classic] [all-browsers] [Silk] - missing sliding pane header background: https://www.screencast.com/t/Nrk33Jokvuao Workaround is to use the Lightweight RenderMode as is affected in the least, or roll back to R3 2016 SP2