I'm gifted with a N900 that works with my carkit
The change that implements the carriagereturn/linefeed remark from Jarmo is visible in the diff (extra line in phonebook-ebook.c, line 169). This diff was implemented on the git obexd source of today.
I uploaded the resulting binary on my homepage here: http://home.kabelfoon.nl/~moongies/sw9vc4htz2/obexd Eric.