tmux fails to redraw on \n

[gar]

Hi guys,
I noted this behaviour on tmux using vim:

   int
   main() {
   return;
   }
If I go to 2nd line and press enter, I have:

  int
  main() {
  main() {
  return;
  }

This _not_ happens if there's no characters on first
column.

   int
   main() {
    return;
   }

If I go to 3d line and press enter, nothing happens.

This beahviour _is_ related _only_ to screen drawing,
in fact the file is not changed (there're no lines
added)

I noted this from snapshots > 1 october, I've tested it
with tmux on a snapshot < 25 september and it's ok.

Ah, I've a _simple_ .vimrc, just a copy of (+/-)
vimrc_example...

Comments?

C.