Checkboxes in Updates tab of Edit Origins application can not be unchecked

[RussianNeuroMancer]

Binary package hint: kpackagekit

Checkboxes (like "backports", "proposed", etc.) in Updates tab of Edit Origins application can not be unchecked.

Steps to Reproduce:
1. Open System settings.
2. Open Software Management.
3. Select Settings.
4. Click "Edit Origins".
5. Select Updates Tab.
6. Check "backports" and "proposed" checkboxes.
7. Try to uncheck it.

Actual Results:
This checkboxes is still checked.

Expected Results:
Unchecked checkboxes.

[RussianNeuroMancer (russianneuromancer)]

This regression appears after upgrade from Maverick to Natty.

[Sam Rog (samrog131)]

Confirming this bug with the clean Kubuntu 11.04 installation.

"software-properties-kde -v" is telling:
Qt: 4.7.2
KDE Development Platform: 4.6.2 (4.6.2)
Software Sources: 0.74

[Sam Rog (samrog131)]

... and the software-properties-kde package version is: 0.80.9

[Max (maxwux)]

this bug affects me

"software-properties-kde -v" is telling:
Qt: 4.7.2
KDE Development Platform: 4.6.5 (4.6.5)
Software Sources: 0.74

the software-properties-kde package version is: 0.80.9

[Robert Roth (evfool)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug #819793, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.