Well...
I cannot say that "something" is wrong with v.0.8.5.
Well there was some Heartbleed bug on the way and others
Thing is that for some reason group of PRO programmers are coding hardly to develop another version of Qt/Core
For some reason they are doing that instead of using v.0.8.5
They are removing small (and some major) bugs and changing Bitcoin Wallet to better app.
I think you should trust this group of Core Developers and follow their creation with using newest versions of Bitcoin Wallet.
As I told before - there is a reason why they made another versions and it is not only commercial thing. It is just that Bitcoin is still in Beta phrase, and they are developing just better software (almost) every version.
That's all
Kind regards.