i think i found it:
the link to check this kind of notice might be this one:
http://www.uscis.gov/graphics/lawsre...k/chronpol.htm
a similar notice, published on 12/29/04, regarding the rescission of concurrent filing of I-140 and I-485 can also be found on the page associated to the link listed above.
(Regression of E31 and E32 Visa Numbers for Applicants from Mainland China,
India, and the Philippines
Rescission of March 31, 2004 Policy Memo re: Concurrent Adjudication of
Concurrently Filed Form I-140s and Form I-485s
12/29/04 William R. Yates HQOPS)