replication failure with GIN index

I'm trying to set up a standby server. Both the primary and standby
servers are on latest version 9.1.3 on ubunt server 10.10. So far I
tried to init the setup 2 times but both failed after the replication
running for some time. what can I do to fix this? The log on the standby
is shown below:

2012-04-06 02:31:01 CST [@] LOG:  restored log file
"0000000200000E3C000000F1" from archive
2012-04-06 02:35:35 CST [@] LOG:  restored log file
"0000000200000E3C000000F2" from archive
2012-04-06 02:36:19 CST [@] LOG:  restored log file
"0000000200000E3C000000F3" from archive
2012-04-06 02:36:48 CST [@] LOG:  restored log file
"0000000200000E3C000000F4" from archive
2012-04-06 02:37:24 CST [@] LOG:  restored log file
"0000000200000E3C000000F5" from archive
2012-04-06 02:37:27 CST [@] PANIC:  GIN metapage disappeared
2012-04-06 02:37:27 CST [@] CONTEXT:  xlog redo Update metapage, node:
37547844/16405/83896882 blkno: 4294967295
2012-04-06 02:37:28 CST [@] LOG:  startup process (PID 24912) was
terminated by signal 6: Aborted
2012-04-06 02:37:28 CST [@] LOG:  terminating any other active server
processes