With our Q3 2014 SP1 release an exception is thrown when you try to maximize an Item. 

Available in LIB version: 2015.1.1208

When you add RadBook as a content of RadTileViewItem and reorder the TileViewItem you get ArgumentOutOfRangeException.

Workaround: You can set the width of the RadBook.

Workaround:
Create a custom style which target type is set to TileViewItemHeader and set it to the HeaderStyle property of the TileView. Then in the custom style, set a custom DataTemplate to the HeaderTemplate property. In this template specify a TextBlock and set its Margin property for instance.

Available in R3 2017 Official Release Version.

The values are switched. 

NewState holds the value of OldState. 
OldState holds the value of NewState 

Reproduced with Implicit Styles with NoXAML binaries only. The workaround is to set a fixed value for the RestoredHeight property of RadTileViewItem

The UnselectAll method, which comes from MultiSelector, does not unselect all items when manually select them one by one. The method will unselect the items in the order they were selected, one by one.

Introduce support for specifying the speed of the auto-scrolling functionality (when the IsAutoScrollingEnabled property is set to True).