Comment 2 for bug 328771

Well, once a key is signed you souldn't have the ability to sign it again, is misleading.
If you want to revoke a sign you should only press the button "revoke a signature".

For seahorse the only valid reason that you could have to sign a key again is to change some parameter as "how carefully have you checked this key? How other will see this signature"?
But why not to place these options outside the signature window?
Why have I to select how carefully have I checked the key? If I sign a key it means that I have verified the ownership of that key (I think the options "not at all" "casually" "very carefully" are only a personal memo that don't affect the signing process).