4.2: the binary compatible release

[Stephen Kelly]

Aaron J. Seigo wrote: 
> for those wondering what binary compat means for us, in a nutshell:
> 
> * we can't add new members to the public classes (the dptr makes that
> unecessary in the first place, of course =)

Are you sure about this one? 
Techbase says you can:
http://techbase.kde.org/Policies/Binary_Compatibility_Issues_With_C++#The_Do.27s_and_Don.27ts

> You can add new non-virtual functions including signals and slots and
constructors.