I was able to get a screen capture after the bug occurred one more time. This time disconnecting from my home Wi-Fi by clicking on "Disconnect" in Network Manager Unity Panel Applet triggered the bug.
The screen capture is attached. ** Attachment added: "Transparent (empty) Unity Panel Applet menu" https://bugs.launchpad.net/ubuntu/+source/unity/+bug/874885/+attachment/2550645/+files/Screenshot%20at%202011-10-16%2018%3A01%3A32.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/874885 Title: Unity panel service uses 100% of CPU, panel applet menus become empty and transparent To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/874885/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs