Only first menu entry is highlighted when using trackpad

[Franck]

When using menus (application menus or indicators) with a touchpad (synaptics), only the first entry of the menu is highlighted when going over. When going on the next entries, the highlight on first entry disappears, but other entries are not highlighted. However, clicking on them still works.

When using a "real" mouse, it works correctly.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: appmenu-qt 0.2.5-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
ApportVersion: 1.94.1-0ubuntu1
Architecture: amd64
Date: Fri Mar 9 11:22:12 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120307)
ProcEnviron:
 TERM=xterm
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: appmenu-qt
UpgradeStatus: No upgrade log present (probably fresh install)