There are no error messages. Here is the order of operations:
1) Start Slingplayer and start watching a Slingbox (I have a Solo).
2) A notification occurs (Facebook, Words with Friends, anything, etc.) and it appears requiring you to tap OK or some other option.
3) Tap a selection.
4) SlingPlayer freezes and the device reboots.
This happens every time a notification occurs for me.