kde42 apps crash with new version 0-3 of kdelibs5

[Xavier Brochard <xavier@alternatif.org>]

Hello

since the upgrade of kdelibs5*4.2.0-2.amd64.deb to version 0-3, some kde 4.2 
applications are crashing. 
Most crashing problems comes from
- dolphin and "plasma desktop" crashing randomly
- kmail freezing on some email (allways the same emails)

The concerned libs are:
kdelibs5_4%3a4.2.0-3_amd64.deb                         
kdelibs5-data_4%3a4.2.0-3_all.deb                      
kdelibs5-dbg_4%3a4.2.0-3_amd64.deb                     
kdelibs5-dev_4%3a4.2.0-3_amd64.deb                     
kdelibs-bin_4%3a4.2.0-3_amd64.deb                      
libplasma3_4%3a4.2.0-3_amd64.deb  

Downgrading to previous versions 0-2 solve the problem. 

After readinbg the changelog of theses packages, I'm not sure if it's a 
packaging problem or a kde problem. Should I report bug to debian or to kde?

I can run a backtrace if needed.

xavier