I notice that the instruction to problem suggesters is now to post ideas in the forums rather than to PM euler or a dev team member. I can't speak for others, but I'm not very comfortable with that because when suggesting a problem I would want to note the possible solution techniques (in an attempt to "sell" it to the dev team) which, if done on the forum, would give the game away to everyone!
Why not allow suggestions by PM to "devteam" (or whatever), an alias to which all dev team members have access?