[O] todo-state change: agenda buffer scrolls

[Michael Heinrich]

hi everyone,

I use org 7.9.4 and I do not quite remember since which version I
observe the following behaviour:

whenever I change the todo state of a task in the agenda this task
becomes line 1 in my agenda buffer.  This is really annoying for me. 
How can I change to the old behaviour where the agenda buffer is not
scrolled down?

Thanks and regards,
Michael.