Vivaldi Snapshot 1.5.658.27 is out today, dubbed as RC2 build, to address the last remaining bugs before Vivaldi 1.5 gets promoted to the stable channel next week. The most important ones being a nasty bug that would not permit dragging or moving of tabs between windows using the context menu to work properly. In other words, Vivaldi should no longer crash when you attempt to move the last tab back to the original window. In the same manner, the WebView contents should now be displayed when attempting to move the last tab between windows. These two regressions have now been fixed in Vivaldi Snapshot 1.5.658.27.