Broken link after user deletion

Hello,
I've tried to delete a user and there is a problem with vbseo (it disappears disabling vbseo)

The username deleted continues to appear in the last post colum of the forum but with an empty id; eg my rewrite rule for username is members/[user_name]-[user_id]/ and the link rewrited become:
members/<deleteduser>-/

in the original version of vb, without vbseo enbled, the url is different and is:
/member.php?find=lastposter&f=2

if i click on that link I've an error saying that the user is not registered and has not a profile to view (this is the correct way to handle this)

of course when I click on your rewrited link I've a missing page

I think this is a bug

Thank you!

any response? is it just a my problem?