User permissions don't get saved if you change the Homebox's name

Hi Jeremy and congratulations for this work ;-)
We're now in the pre-production stage and are experiencing some minor bugs.
Most recent one is :
- I've got the latest homebox version installed
- I have set a homebox names 'aaaaa'
- I've given many roles the permission 'access aaaaa' @ admin/user/permissions
- I've changed my mind, edited the homebox and given it the 'bbbbb' name
- All permissions are lost : no one can access bbbbb

Sorry about always bothering you with user permissions :)