FC6 tracking bug: see blocks bug list for full details of the security issue(s). [bug automatically created by: add-tracking-bugs]
Than, you'll have to do this one, I don't have access to Core6. (F-7/ and devel/ branches are done).
it's fixed in kdegraphics-3_5_7-1_fc6_1, and will be pushed into FC6-update today.