I'm also having a problem creating a signature, and uploading an Avatar.
1. On my user CP - Settings & Options,I have the option:
1a. Edit email & password.
1b. Edit profile
1c. Edit options
1d. Edit Avatar
I can't find a setting to edit my signature. As regards editing my Avatar, it says: your current Avatar with the tic box showing do not use a avatar.
You can't untick the avatar box, and you can't reset the fields.
I would appreciate if the moderator of this forum would help, and throw some light on how to resolve these problems. Are there any hidden settings and fields? It's very frustrating; to say the least.