And I can't do anything to the code anyway, as I have the Oldies donator in my signature so it won't let me save the changes without losing my ticker...
I'm not sure why that would happen as you don't have to go anywhere near your signature code to change your avatar url
I've tried your avatar url in two different browsers now and they both say the image isn't there so it does look like the address is wrong or has changed somehow. If you can copy the code from Imageshack and paste it here, I'll try and sort it out on your profile (might have to be later though as am going out soon)