Different opinion...
Once in a while I have to zap a response- this time for c4naperville. Your response is inaccurate. Usage of AP does not mean that H1 is invalidated!!!
One can go back to H1 even after usage of AP. Although I have discussed the reasons before in many an archive, I'll repeat it again here (for the benefit of naperville resident)
1. whether you use H1 or EAD, is proved by the I9 form filed with the employer which never gets to INS!!
2. After 485 , H and L visa holders need not get a AP. H or L visa is sufficient
3. Per June 2001 memo, one old (expired even) h stamp is enough to admit somebody into US - yep U need the latest H approval in hand.
4. Mastaan and gctry did it. One did revalidation of H visa after entering into US using AP. Other did the H1 and H4 stamping at chennai consulate after entering US using AP. See the archives.
Read murthy's "previous" chats...
On a different note, If U start using EAD (i.e. filed I-9) U better use AP for travel...