Thread: Unable to upgrade to KDE 4.7.4

i have kde 4.7.3 crashes regularly. filed crash report , told problem has been fixed in version 4.7.4.
however, when try update, reply have latest version!!
please refer following captures:

sudo apt-get update
...
fetched 2,626 b in 4s (623 b/s)
reading package lists... done
w: gpg error: http://ppa.launchpad.net oneiric release: following signatures couldn't verified because public key not available: no_pubkey 5a9a06aef9cb8db0

i don't know above error since not have entry in sources.list

then, trying update workspace:

sudo apt-get install kde-workspace
reading package lists... done
building dependency tree
reading state information... done
kde-workspace newest version.
0 upgraded, 0 newly installed, 0 remove , 0 not upgraded.

then, checking current version of workspace:

apt-cache policy kde-workspace
kde-workspace:
installed: 4:4.7.3a-0ubuntu0.1
candidate: 4:4.7.3a-0ubuntu0.1
version table:
*** 4:4.7.3a-0ubuntu0.1 0
500 http://ubuntu.mirror.iweb.ca/ oneiric-updates/main i386 packages
100 /var/lib/dpkg/status
4:4.7.1-0ubuntu5 0
500 http://ubuntu.mirror.iweb.ca/ oneiric/main i386 packages

any clue of next?

thanks,

grr

http://www.kubuntu.org/kde-sc-474

Forum The Ubuntu Forum Community Ubuntu Official Flavours Support Desktop Environments [SOLVED] Unable to upgrade to KDE 4.7.4

Ubuntu