Dead keys on LibreOffice

I'm having an issue on LibreOffice 4.1.5.3 OpenSuse 13.1 x86_64.
Whe i create a new document I can use dead keys in a normal way, for instance:

Then If i save the doceument, open it again and continue writing, deadkeys donn't work (second line, typing the same as first line)


I've read It might be something about locales but I cna't find what.

In any other app, deadkeys work fine (for instance thunderbird, firefox, kwrite, konsole, etc.)

any help?

regards