Hi Ken.
I've recently upgrade my FS environments to the latest stable 1.2.12.
I've found that everytime i entered a conference it resulted in a segmentation fault.
When digging on the problem i found that it is related with the commit referenced above.
Basically i had to set the conference_moderator_pin channel variable when entering a conference otherwise i have a segmentation fault in FS.
Regarding this issue my question is why did you make the mdpin pointer variable a const?