Version:           KDE 4.3.1 (using KDE 4.3.0)
OS:                Linux
Installed from:    Debian testing/unstable Packages

Strange and extremely nasty behaviour of taskmanager since update to KDE 4.3.1: it doesn't expand to full panel's width anymore, only has the width of one application button and only expands with adding more open applications. This leads to the problem that the following widgets in the panel now sit unmotivated somewhere around the middle of the panel instead at the right side - and they move when the taskmanager grows and shrinks! I tried taming this behaviour with a flexible spacer between taskmanager and widgets but this only lasts for one session. After a new login the spacer still is where it's ment to be but because of the tiny width of the taskmanager it moved to the left and the other widgets sit in the middle of the panel again. When I try to drag the spacer to a width that moves the following widgets to the left of the panel the spacer gets a fixed with and the task manager cannot expand at all. 

It was perfectly fine with KDE 4.3.0: the whole panel was used by the taskmanager and at the right end of the panel there were my widgets like cpu monitor, clock, access to desktop and so on. Now it's not usable anymore, the space behind the widgets is not usable and it looks just terrible.