Change in 'ar' behaviour

[Jeff Baker]

One of our customers has noticed a change in the behaviour of 'ar' 
between 2.10.1 and 2.12.1 or later.

2.10.1
------
$ ar rcs test.a object.o
$ ar rcs test.a dir/object.o
$ ar tv test.a
rw-rw-rw- 1003/513  21368 Jul 27 13:14 2004 object.o
rw-rw-rw- 1003/513  12384 Jul 27 13:14 2004 dir/object.o

2.12.1 (or later)
-----------------
$ ar rcs test.a object.o
$ ar rcs test.a dir/object.o
$ ar tv test.a
rw-rw-rw- 1003/513  12384 Jul 27 13:14 2004 object.o

I tried the -P option to ar, but that only causes ar to add every object 
to the file whether the full path matches or not.  Is this behaviour 
expected?