I found the problem : it was due to some kde4 meta packages not compatibles that were installed and had to be removed to install new packages.
-- [kde4-gutsy]bug in installation of some application https://bugs.launchpad.net/bugs/181470 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
