I use the Object Types Editor to define groups of custom properties.
But when I have added a Tile to the Object Layer and select fx. “Moveable” under the “Type”, I can see the new properties being added under “Custom properties”.
But when I save the map, and try to read properties for this tile on the Objects Layer, it has no properties ?
Shouldnt the properties selected by using “Type” be added to the Objects Layer definition for that tile ?
Ahhh, its because my properties for that particular tile comes from 1) Tile definition in TileSet and 2) Object Types definition, current only support as an export.
I guess I need to make my own loader fo those and apply them manually.
And remember to export the Object Types definition each time i change them.
Any reason for they are not included in the map ?
Because that would be redundant. And also, because that would mean you have overridden those properties with different values. That said, I understand it can be useful to resolve all the properties on export, so the plan is to add an option for this. It is related to the following issue:
I just think at least a reference to the Object Types file like the tileset inside the map file, would be usefull.
Like in the Github issue 
thanks
Just noting that the above options are in the meantime available in the development snapshots and will be in Tiled 1.2.