MOSS: Deleting site gives error message

Problem:
When deleting a site, you get error: 500 INTERNAL SERVER ERROR. Error is just black text on white background, nothing else.

Some errors are logged into MOSS log:

There is no Web named "/SiteA/testi/_layouts/webdeleted.aspx".

Possible mismatch between the reported error with code = 0x81070504 and message: "There is no Web named "/SiteA/testi/_layouts/webdeleted.aspx"." and the returned error with code 0x80070002.

Thoughts:
Simple.master page has been altered to brand the layout of different pages, which is causing the problem.

Workaround:
Revert Simple.master to original version that came with MOSS.

Solution:
You cannot have

<wssuc:Welcome id="IdWelcome" runat="server" EnableViewState="false"></wssuc:Welcome>

on the simple.master page. Remove it and it works, if not, remove controls from the page one by one until you find out the one causing the error.