Because not everyone will follow the security announcements of debian very closely.

Debian has discovered a serious issue with openssl, that means your ssh key can be less secure than you expect.

Details at: http://wiki.debian.org/SSLkeys

What does it mean for KDE? If you use svn+ssh, you need to check if you are hit by this bug, read the wiki page carefully and take appropiate action.

If you change your key, send the public part of it to sysadmin@kde.org and do not forget to mention your username.

If you are using https to access kde’s svn, there is no problem as far as i can tell.