Just noticed an error when opening a UserControl in Design view. It happens for new UserControls too. As soon as the file opens in the designer, an error pops up as shown in the attached, complaining about some “setOption”. After dismissing the error, the designer opens but the each control contained in the UserControl has a red triangle with a white exclamation mark in it. This is with 1.2.78.
It will be fixed as soon as the two are in sync. Hopefully with the last beta update today and a release candidate in a day or two.