icons in dash abruptly re-shuffle

[jeremy-list]

To replicate:
1: Open the system monitor
2: Open any application which is memory-intensive enough to cause swap space to be used
3: Try to open another application from the dock.

What happens: The dock opens and icons appear as expected, but then the icons suddenly disappear and reappear in a different order. This is an extremely annoying bug because it causes me to frequently open the wrong file or application.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: unity 7.1.2+13.10.20131014.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic i686
ApportVersion: 2.12.5-0ubuntu2
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,move,place,imgpng,grid,vpswitch,snap,mousepoll,gnomecompat,unitymtgrabhandles,regex,resize,session,animation,wall,workarounds,fade,expo,scale,ezoom,unityshell]
Date: Wed Apr 9 22:50:04 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2011-08-09 (974 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
MarkForUpload: True
SourcePackage: unity
UpgradeStatus: Upgraded to saucy on 2014-04-03 (6 days ago)

[jeremy-list (quick-dudley)]

NB: this bug is present not only on the laptop I'm using to file this report, but also on all 6 of the desktops running Ubuntu in my office.