I think you could go with length 36. And you could get down to 32 by stripping out the dashes.
- [web2py] uuid - Postgresql-type Johann Spies
- [web2py] Re: uuid - Postgresql-type pbreit
- Re: [web2py] Re: uuid - Postgresql-type Johann Spies
- Re: [web2py] Re: uuid - Postgresql-type pbreit