Assigned window hotkey makes it through to gnome-terminal

I have Alt+1 assigned to "Switch to Workspace 1" (and similar for Alt+2, Alt+3, etc). If I'm in a terminal on workspace 2 and I hit Alt+1, when I return I see that Alt+1 has been delivered to Unity (which made the switch) but also the focused terminal as well. This may leave garbage in my terminal if I'm doing a "read foo" or may alter the behavior of the running app (such as with something like irssi).

This is a clear regression from all previous versions of Unity that I've used (11.10, 11.04, etc).

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.6.0-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12
Uname: Linux 3.2.0-20-generic x86_64
ApportVersion: 1.94.1-0ubuntu2
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,grid,place,mousepoll,session,wall,move,compiztoolbox,resize,regex,snap,vpswitch,gnomecompat,imgpng,animation,unitymtgrabhandles,workarounds,expo,ezoom,fade,scale,unityshell]
Date: Thu Mar 22 10:14:19 2012
InstallationMedia: Ubuntu 10.04.3 LTS "Lucid Lynx" - Release amd64 (20110720.1)
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/zsh
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2012-03-22 (0 days ago)