Rsync errors when running from cron

if I run rsync directly I get no errors (I am running it from a simple
bash script)

When I launch those scripts from cron I get the following error each
script same error (the only difference between the scripts is the source
and destinations)

0 files...
100 files...
200 files...
rsync: writefd_unbuffered failed to write 4092 bytes: phase
"send_file_entry" [sender]: Broken pipe (32)
overflow: flags=0x72 l1=101 l2=1142977646 lastname=^A^B_.^A
ERROR: buffer overflow in receive_file_entry [receiver]
rsync error: error allocating core memory buffers (code 22) at util.c(121)
[receiver=2.6.9]
rsync: read error: Connection reset by peer (54)
rsync error: error in rsync protocol data stream (code 12) at
/SourceCache/rsync/rsync-31/rsync/io.c(515)
building file list ...


I've been trying to scroogle (www.scroogle.org) the info and I'm not
finding anything useful.

The system initiating this is Mac OS X (10.5.2) with rsync 3.0.2 and the
destination is a ReadyNAS NV+ I believe the rsync on that is 2.6.9 but
don't quote me on that.

Thanks,