cpu count with AIX 6.1 and SMT4

We upgraded from AIX 5.3 to 6.1, with a change from SMT2 to SMT4 (from 2 threads per core to 4 threads per core).

PGP now thinks we have 8 cpus instead of 4.

We are able to get it to accept the licence if we reduce SMT back down to 2, but this shouldn't be necessary, since our number of cores hasn't changed.

Is there a version of PGP available that supports SMT4?

Thanks.

Jim