Hello,

I am sorry, for the mess in my previous mail.

I've experienced occasionally errors while executing org-clock-in 
from
the agenda. The errors seems to be that indent-line-to is called 
with a
negative argument. Moving from the agenda to the todo headline in 
the
underlying org file and repeating org-clock-in and org-clock-out 
usually
lead to a state in which I could successfully run org-clock-in.

The following patch fixes the issue for me and I believe it does 
no
harm. I've used it daily for two month. I'd appreciate if you 
could add
it to org-mode.

Kind regards,
Jean-Marie