If you reference this thread, CCP Aurora confirms they are playing with settings on forum user ranks and trust levels in terms of both giving users new powers (which we begged them to revoke after demonstrated how they could be abused and them some users straight up abused them immediately) and by limiting functionality of existing users. The inability to edit posts is probably due to having a low trust level after these changes. @CCP_Aurora can you confirm?
@CCP_Aurora if this is the case, you need to have a mechanism in place for people to petition to be given higher access. Please refer to the link in my OP and you’ll quickly see why it’s important.
Flag the first post of the thread for moderation, Other: ask to unlock to resume using thread. I did this recently and the thread was promptly unlocked.