The fix will be released with Q1 2016 offical version.
The fix will be available with Q2 2015.
The problem should be resolved with lib version 2015.3.1026.
As a workaround you can apply the style explicitly or through an ItemContainerStyleSelector.
I use RadTileList without any tiles grouping. But internally TileListPanel get top padding 30 px. So visually I got "hole" above the list. And i can't set margin -30 because i can't be sure about this padding. ItemsPanelTemplate with padding="0" don't work properly as described at http://stackoverflow.com/questions/23091182/layout-issue-with-telerik-radtilelist-control. I tnink that this top padding should be 0 px if there are no groups at tiles or no "TileGroup" elements are specified.
Should be resolved with lib version 2014.3.1402.
Should be resolved with Q3 2014 expected till the end of October.
Touch does not work correctly when RadTileList is unloaded and loaded again. The same behaviour can be observed in case TileList is placed in TabControl. Resolved with 2014.1.414.
RadTileList: Memory leak when removing items from the collection of ItemsSource of the RadTileList and then change any property of any of the removed items. Available in LIB version: 2017.2.605