It's an interesting one. We pool the funds in our SMSF so this wouldn't come up for us. I would speak to my accountant about it, but thinking out aloud; the fund is the taxable entity so there really isn't a CGT event in that you are just reallocating assets between the members accounts, moving shares and compensating with cash. I remember hearing that this is one of the benefits of a SMSF versus say an industry fund. When you are in an industry fund and change over from accumulation to pension you generally pay CGT whereas you don't inside a SMSF.
Interestingly I just found this about a planned ban on off market transfers for SMSF:
http://www.superguide.com.au/smsfs/smsf-off-market-share-transfers-may-be-banned-from-july-2013