There are a few issues with R8 Microwatt specifically. I have been on the road and unable to respond, but over this weekend, I will post some updates.
Most of it is likely because of some of the Jessie pieces and parts that got included in Microwatt without enough testing. The easiest fix is to add Jessie repos and reload the packages and you will be ok. I will post some info on the mechanics of that sometime later today. (west coast US time).