kwallet(manager) is broken after upgrade in 14.04/dev

[aljosa]

kwalletmanager UI doesn't react to changes (like clicking checkboxes and similar), applications using kwallet can't get passwords out of kwallet.
sometimes wallet is closed and if i open it crashes other times it's open (enabled/active) but can't be used by other apps.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: kwalletmanager 4:4.12.95-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-21.43-generic 3.13.8
Uname: Linux 3.13.0-21-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14-0ubuntu1
Architecture: amd64
CurrentDesktop: KDE
Date: Wed Apr 2 16:47:17 2014
InstallationDate: Installed on 2013-03-08 (389 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64+mac (20121017.3)
SourcePackage: kwalletmanager
UpgradeStatus: Upgraded to trusty on 2014-03-22 (10 days ago)

[Launchpad Janitor (janitor)]

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

[SteBo (stebo)]

Still broken with package version kwalletmanager 4:4.12.97-0ubuntu1

[DrMartinus (linux-drmartinus)]

For me, kwallet 4.13.0 does not accept the password for the default wallet, which i have used over years and should still be the same. I cannot access my passwords, which I consider extremely serious, as some of the passwords I do not remember (and haven't noted them down unfortunately).

[robegue (r087r70)]

Confirming bug on kubuntu 14.04 latest kde.
I use empty password but kwallet does not open: "Error code -9: Read Error"

[robegue (r087r70)]

my kwalletmanager version is 4.14.2

[Tiago Rinck Caveden (caveden)]

Same thing as robegue. Empty password (as volume is encrypted anyway), can't open it anymore. Error 42 is shown. This is quite annoying as chromium uses kwallet, the wifi password is stored there etc. I just installed a fresh 14.04 as the latest version upgrade (15.04) simply broke everything here and wouldn't boot.

Is there any workaround or manual fix I can apply?

Thank you!