Anyone with more experiences can have a look at bug #61654 ?
The bug report describes the problem, but to make it short: KOffice 
application barfed on thumbnail preview stored inside the documnet. Even 
Konqueror crashed on handling the png file, when it's extracted.

--
Ariya Hidayat, ariya@kde.org, http://ariya.pandu.org
"Don't code today what you can't debug tommorow"

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