AIR SDK 17 iOS list skins confused

Using the latest SDK 17 (115) on iOS the app has issues with datagrid/list skins - if you manually skin using setRendererStyle, it seems ALL the skin states are using the Selected skins. For example, the upSkin state uses the selectedUpSkin skin as far as I can make out (in tests this seems to be the case) In other words, to set the upSkin to the skin you want, you have to set the selectedUpSkin - .setRendererStyle("selectedUpSkin", CellRenderer_upSkin). This does not seem to be a problem on the other platforms - Android, Windows, Mac.