This bug was fixed in the package kpackagekit - 0.5.4-0ubuntu2
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kpackagekit (0.5.4-0ubuntu2) lucid; urgency=low
* Switch to source format 3.0 (quilt)
* Don't use the quilt dh addon. It was causing an FTBFS since there wasn't
a build-depend on quilt and with source format 3.
In KPackageKit 0.5.4 the "update" button is gone and updates are applied
with the "apply" button.
** Changed in: kpackagekit (Ubuntu)
Importance: Undecided => Low
** Changed in: kpackagekit (Ubuntu)
Status: New => Fix Committed
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Confusing button placement/description in software upd
I find the UI quite confusing too.
The problem is even worse. If you want to perform the default action for
the notification "updates are available", i.e., install the available
updates, you _must_ click the right buttons in the right order: First
"Select all updates", then "Apply".
If you forget