Unity dash search and HUD do not handle Greek accents properly

When typing accented words in Greek, the accent is "placed" befole the accented letter rather than on top of it.
For instance, typing "προγραμματισμός"(= programming) in dash results to this: "προγραμματισμ´ος".

Steps to reproduce:
1. Type an accented word in dash search/HUD
2. Observe where the accent is placed

Additional information:
If I recall correctly, this was not an issue in Natty. I haven't installed Oneiric, hence I don't know if this bug is reproducible there.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.10.0-0ubuntu6
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic i686
NonfreeKernelModules: wl
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
CheckboxSubmission: c8e668fe14ff2a447d87d27acf9e150b
CheckboxSystem: b845c366ea09c60efa3a45c1b5b21525
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,imgjpeg,imgpng,move,place,session,regex,shift,animation,workarounds,imgsvg,gnomecompat,mousepoll,resize,grid,expo,vpswitch,unitymtgrabhandles,wall,fade,ezoom,scale,unityshell]
Date: Thu May 3 08:18:08 2012
InstallationMedia: Ubuntu-Netbook 10.04 "Lucid Lynx" - Release i386 (20100429.4)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=el_GR.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2012-05-02 (0 days ago)