Fundamental change of locking behavior in 7.1

Since I see, that Tom has implemented the "keep a AccessShareLock lock until
transaction end" philisophy I would like to state a protest.

This is a fundamental change in behavior and I would like to see
a vote on this.

The one example we already know is:

session1 session2
begin work; begin work;
select * from tenk1 limit 1;
select * from tenk1 limit 1;
lock table tenk1; --now waits (why should it ?)
lock table tenk1; -- NOTICE: Deadlock detected --> ABORT

I think this is not acceptable in committed read isolation. The AccessShareLock
needs to be released after each statement finishes.

Thank you
Andreas