I've encountered update issue today.
Is libstdc++-6.4.9 really necessary ? Any chance to downgrade dependency to 6.4.8?
Raspbian Wheezy has only 6.4.8 hence I'm unable to update GIMX.
I'd update to new distro (Jessie) but I'd have to install Raspbian from scratch as "live" update is not possible due to system changes. ...but I don't know if latest distribution has update dlibstdc++6.

Kind Regards,