I’ve been constantly having problems with the slingplayer app too:
Ive emailed tech support which I should get a reply monday. If enough of us are experiencing this issue and comment and complain to them about it then hopefully they’ll get around to fixing it. Like you i’ve had no probs with the pc app or sling site, i’ve just downloaded the android app too and it works perfectly and fast which wdtv should be more like.
The slingplayer app is the main reason i bought the box and i feel like i bougt a paper weight, however the netflix app works flawlessly although i read that it wasn’t the case at first but got fixed, fingers crossed slingplayer is fixed or redesigned a.s.a.p
