I had this happen, but it somehow fixed itself several minutes after I noticed it. Gnome-panel was using 3+ GB. (I noticed it, because when trying to open some new programs I was getting messages saying I was low in memory.)
** Attachment added: ".xsession-errors.old" https://bugs.launchpad.net/ubuntu/+source/gnome-panel/+bug/953997/+attachment/3267437/+files/.xsession-errors.old -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/953997 Title: gnome-panel using over half of my memory, all apps slow. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-panel/+bug/953997/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs