Compression and bitmap indexes

When I first tried to compress an existing partitioned table with local bitmap indexes I got an error saying I 'could not compress the partition with a valid bitmap index' or word to that effect. I mistakenly took this to mean this was always the case. It appears that once the compress operation has taken place and the bitmap indexes rebuild from then on all will be OK and the erro does not reappear and this is the reason why :- http://stanford.edu/dept/itss/docs/oracle/10g/server.101/b10736/parpart.htm