I too am experiencing this problem (twice so far since upgrading to 13.10 and I don't think I had the problem before that).
The system becomes fairly unresponsive e.g. can't unminimise windows from the launch bar and it may not even be possible to minimise windows. I can start System Monitor and it shows that ibus-ui-gtk3 has taken 8GB of memory (half what I have) and growing quickly. I have not let it get beyond that. I think that logging out clears the problem. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to ibus in Ubuntu. https://bugs.launchpad.net/bugs/1271839 Title: ibus-ui-gtk3 big memory leak Status in “ibus” package in Ubuntu: Incomplete Bug description: ubuntu 13.10 64bit 2gb of memory leak To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ibus/+bug/1271839/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp