OTP R8B emacs mode compile hangs

[Hal Snyder]

Has anyone seen this - 
  edit foo.erl in Emacs
  hit C-c C-k to compile
  ... sit there for 60 seconds, compile times out ...

This is with GNU Emacs 21.1.1, R8B release, NetBSD-1.5.2.
(BTW paths in .emacs and such have been edited for NetBSD file
placement.)

Problem is that in inferior-erlang-wait-prompt, line 5245,
		 (beginning-of-line)
seems to execute in shell mode, going to the beginning of the line
after the prompt instead of to left margin. Changing it to
		 (forward-line 0)
fixes the problem.

Seems erlang shell mode changed beginning-of-line, or something.
Talk about side effects. Elisp ain't Erlang. (EAE) :-0