Just checked and I still don't have an option to do so for any of mine but I haven't checked if i could mark others.It is working for the staff but I haven't enabled it yet for all members. I will do that now under the condition that the modification only allows you to mark your own thread as solved. If anyone can mark anyone's thread solved then that will be a problem. I'll enable it for you now.
EDIT: Enabled. Let me know the extent of your ability to mark a thread solved - any of them or just you own.
Please don't PM your password. Staff should not ask for, nor receive passwords. I can simply take your word for it. We'll keep working on this, as this feature is pretty handy at times.Yup just tried it and it didn't work. I can pm you my password so you can check it out as well.