The undo jobs that after the modify layout causes error when I changed the 
layout that contains clipart and then return to initial layout. 

Replication Steps:
1)Invoke Presentation of OpenOffice.org 641
2)Select Format -> Modify Layout
3)Choose 9th Autolayout which contains Title, Clipart, Text
4)Press OK
5)Double click clipart part for adding graphics
6)Press Cancel in Insert Graphics dialog box (i.e. insert nothing)
7)Click Undo button or Press Ctrl+Z
8)Repeat 7) more than 3 times
9)The program crashes. 

Note) This bug appears also on 11th Autolayout that contains Title, Text, 
Clipart.