Closing group of windows from Task Manager crashes Plasma ? Anyone ?

Also while a big file is being copied in Dolphin. Refreshing continuously like F5 many a times, crashes dolphin ?

Hey,

The closing group of windows is caused by a bug in Qt but has been fixed. I don't know what distro you are running but you might want to ask them to read this bugreport:
https://bugs.kde.org/show_bug.cgi?id=210146

You might want to file a bugreport on bugs.kde.org for the second issue.

What version of KDE are you running actually?

I am running KDE SC 4.4RC1 on Karmic

kwin 4:4.3.90-0ubuntu~karmic1~ppa3
dolphin 4:4.3.90-0ubuntu1~karmic1~ppa2

Most QT packages on 4:4.6.0-1ubuntu3~karmic1~ppa1

Qt 4.6.1 was released today. I expect kubuntu to update their packages pretty soon. The plasma crashing issue should be resolved then.