redmine backport not installable

[Karsten Heymann <karsten.heymann@blue-cable.net>]

Hello,

the redmine package from lenny-backports is not installable:

  root@svn:~# apt-get install -t lenny-backports redmine
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:
  
  The following packages have unmet dependencies:
    redmine: Depends: libjs-prototype (>= 1.6.1) but 1.6.0.2-4 is to be installed
             Depends: libjs-scriptaculous (>= 1.8.2) but it is not going to be installed
  E: Broken packages

Am I supposed to install prototype and scriptaculous directly from
squeeze or will they be added to the backports repository later?

Yours
Karsten