I select "owncloud-client" from the list; I do know that there is an update available (because it was down-graded after fiddling with the debextra entries ...). This is what happens afterwards:
Enter selection ( 1 - 35 ) or just Enter to proceed, (n)ext, (p)revious:
owncloud-client
Press Enter to update check above SCE(s), (q)uit to exit:
Checking owncloud-client.sce...
owncloud-client update check...
Update check completed.
owncloud-client
Press Enter to update above SCE(s), (v)iew package updates, Ctrl-C aborts:
Press Enter to review packages that had updates available, (n)o to exit:
owncloud-client updates:
libowncloudsync0 http://download.opensuse.org/repositories/isv:/ownCloud:/desk
top/Ubuntu_14.04
libqtkeychain0 http://download.opensuse.org/repositories/isv:/ownCloud:/deskto
p/Ubuntu_14.04
libssl1.0.0 ubuntu trusty main
owncloud-client http://download.opensuse.org/repositories/isv:/ownCloud:/deskt
op/Ubuntu_14.04
owncloud-client-l10n http://download.opensuse.org/repositories/isv:/ownCloud:/
desktop/Ubuntu_14.04
However, the second step ("update above SCE(s)") does not do anything. Indeed, the screen output flushes right away to the next step ("review packages that had updates available").
Issueing ''sce-update owncloud-client'' on the other hand does perform the update well.
This all is on dCore-trusty:2016.02.17.17.16