Just so hard for me to see the details that small but I'm giving it a try now about to change my sig now to see what it looks like.
Printable View
Well I just compared a sig created at 500x100 vs one created at 1000x200 and shrunk to 500x100 and there was no difference when I uploaded them. They key was to shrink the 1000x200 to 500x100 before I use the save for the web feature. If I use that feature to shrink it the pic degrades but If I do it before hand I get a lot better quality. So now that I know that I can just work at 1000x200.
I been making my own backgrounds, pretty generic ones but I made them. Once I learn more I can start to make better ones.