Problem with alternative

[Carsten Block]

Hello,
I'm using lilypond version 1.1.50 and have a problem with repeat/alternative.
I tried this code

 \time 4/4;
 \repeat semi 2
 {
  \partial 4; f'8 g' | a'4 a'8 a'4 g'8 f'4 | f' d'8 c'( )c'2 |
  f'4 f' 
 }
 \alternative
 {
  { [g'8 f'] g' a'( | )a'2 r4 }
  { \partial 2; [g'8 f'] e' f'( | )f'2 r2 }
 }

The first alternative doesn't begin at g'8 f', but at the next bar. If I
change \time to 2/4, it works, but that's not what I want.
What can I do?

Hoping, you understand my question,
Carsten