plasma-widget-networkmanagement doesn't show 3g/umts signal strength in tray

[Ray-Ven]

the systray icon doesn't show anything (it's just "empty") sometimes, or just shows a mobile phone icon when connected to 3g.
it should show signalstrength though.
killing plasma-desktop and restarting it after establishing the connection makes the tray widget show the signalstrength though, which makes me believe it should show it from beginning
is this a packaging issue? This persists since lucid or so

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: plasma-widget-networkmanagement 0.9.0.8-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
Uname: Linux 3.8.0-19-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
Date: Tue Apr 23 19:38:08 2013
InstallationDate: Installed on 2013-04-10 (12 days ago)
InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130410)
MarkForUpload: True
SourcePackage: networkmanagement
UpgradeStatus: No upgrade log present (probably fresh install)

[Ray-Ven (ray-ven)]

it's not related to networkmanager itself - it's just the plasma widget

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[jsiebold (jsi150)]

I can reproduce that error (see attached bug report). The problem does not exist if I disable desktop effects. In this case I get the signal strength indicator for the mobile broadband connection but the characters below the indicator are barely readable.

[Ray-Ven (ray-ven)]

works in saucy