BTW, I have applied in Dallas BCIS. I have filed for the Spouse adjustment of Status package ( Forms 485, 130, 325, 764,865 ..) after my Citizenship (May 24 2003). I am very sure they returned because of "Personal Check" . I field my N400 last year Aug with personal check, there was no issues, but this time they returned saying that "BCIS no longer accepts personal checks since mar 03". I would suggest not to take chance. Just send as money order or cashier's check. I think they did not update the web site.
SV