Trouble with pg_dumpall import with 7.2

Hi,

I have done what exactly explains the documentation for the migration from my databases in 7.1.3 to 7.2 ...

But during the importation in Postgresql v7.2 of the data from the pg_dumpall ...
I get sometime this message :

psql:backup:24473309: ERROR:  DefineIndex: index function must be marked iscachable

backup is my pg_dumpall file ...
Why this message ?
May I have lost index ? or data ?

Could you explain me ?

Regards,
-- 
Hervé