Someone must have been watching the network traffic closely to spot the 0.8.8.3 client. It is a maintenance release to allow v3 blocks on 0.10. Feels like a lot of effort as 0.9 will be coming out tomorrow or the day after. The 0.8 source has to be updated and as I have to compile I may as well release it.
I will test that it syncs and that UPNP is enabled, make sure that UPNP is enabled on your router to allow the auto configuration of incoming ports. It should work without it, but more connections are supported with the incoming ports open.