Now it want even start after the last yum update:

$ ooffice 
Use of uninitialized value in string at /usr/bin/ooffice line 355.
Use of uninitialized value in string at /usr/bin/ooffice line 355.
free(): invalid pointer 0x72bfd0!
Aborted

Exactly the same error if I try to start oocalc or oowriter etc.

I get this:
$ ooffice 
Use of uninitialized value in string at /usr/bin/ooffice line 355.
Use of uninitialized value in string at /usr/bin/ooffice line 355.

but OOo starts and works fine

With openoffice.org-1.1.2-3.ppc, that is

So can anyone else repeate comment #1?

Please test with the openoffice.org-1.1.2-5 RPMs in Rawhide, it should
be fixed in that version.  If the problem persists with that version,
please reopen this bug.  Thanks!