From the posts in the previous pages, I see people were having the "signature not found" problem many days ago but the problem has been solved already.
I received my payment 3 days ago with no trouble, but then it showed "signature not found" just now when I haven't touched my signature at all. I have no idea why and how it happened, so maybe OP you could investigate on it.
It would be cool if you can add the missing 4 posts back to my "New posts" counter. Thanks.
EDIT: After some testing, I found how to reproduce my problem. Evenytime after I change my bitcoin address on my profile, I will get the "signature not found" for some reasons.
maybe try to copy the new sig code in the OP as the admin stated, maybe they changed some codes
All users who have 'not found' signature issue, please copy/paste the signature from original.
Update: I believe I found how it happened.
The signature code for hero members have 177 characters. When I copy and paste it onto the signature section on my profile, it shows "Max 4000; characters remaining: 3823". After clicking "change profile" at the bottom right, the final character (I believe it is a line break) is removed automatically and it becomes "Max 4000; characters remaining: 3824". The bot still thinks I am wearing the correct signature at this moment.
But then when I change my bitcoin address and keep my signature untouched (it now only has 176 characters) and click "change profile", the bot thinks I am wearing the wrong signature.