"Enable this to disable..." is needlessly confusing, simplify it by being upfront that this setting disables the Gravatar fetching.
@@ -257,7 +257,7 @@ continue = Continue
cancel = Cancel
enable_custom_avatar = Enable Custom Avatar
-enable_custom_avatar_helper = Enable this to disable fetch from Gravatar
+enable_custom_avatar_helper = Disable fetch from Gravatar
choose_new_avatar = Choose new avatar
update_avatar = Update Avatar Setting
uploaded_avatar_not_a_image = Uploaded file is not a image.
Kunal Mehta