From http://www.immigration-law.com/
If it is going to happen all pending I-485 will be screwed
The S. 1639 CIR which the Senate will take up next Tuesday and attmpt to pass next week has a deadly provision which has gone unnoticed in the EB immigrant community. It is repeal of this provision under Section 419 of the S. 1639 bill and elimination of the opportunity to change employment for the EB-485 filers during and until EB-485 applications are decided regardless of the amount of delays they may have to endure after filing of EB-485 applications.
If it is going to happen all pending I-485 will be screwed