Then you should check how many index.xml.0.tmp you have.(and
rename them back)
When did you get this index.xml.0.tmp ? (also see time on file) is
when you repliacted og updated or ?
As far as I know you wil only get index.xml.0.tmp files on
replication and on system cleanup.
This type of problem i saw when i upgrade a test vault from 08 to SEPDM2009.
It happen when there is a problem in up gradation.