can not save openoffice spreadsheets in libreoffice

[Paul Stear]

Hi 
Since upgrading to the latst kubuntu version I have various problems but a 
major one is not being able to save spreadsheets.
I can open them, modify them but when I come to save changes libreoffice just 
crashes and clears the screen.  I thought it might be a permissions problem byt 
other openoffice files work correctly.
I am asked each time I onen a spreadsheet to recover from the last crash, if I 
do or don't it doesn't make any difference.
I have 3 spreadsheets each with 13 pages and links to each other.

Any experts know how to solve this?

Thanks in anticipation
Paul
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