I've recently updated from 12.2.0570 to 13.1.0580 and ran into a few problems with loading a persisted layout of floating tool windows. First is that all the tool windows went to a 0,0 size and shows up as little blue squares. The squares can be resized but the tool window content does not show.
Second when starting fresh and deleting the docking layout file I can drag out to float one of the tool windows but when the preview shows, they are again blue little squares that are being dragged around, however when dropping the tool window not over a anchor the tool window is sized correctly. If you were to drop on an anchor, then drag to float again the preview works.
I opened the sample browser and ran the Layout Persistence QuickStart sample and it does exactly the same thing.
So has anyone else had this problem?