Unable to install Iceweasel 5 on Squeeze

[Tyler Ness]

I added the repository and key without issue.  Running Squeeze 6 and
using the "Release" repository.

- When running "apt-get install -f squeeze-backports iceweasel" I get:
The following packages have unmet dependencies:
 iceweasel : Depends: xulrunner-5.0 (>= 5.0-3~bpo60+1) but it is not
going to be installed
E: Broken packages

- When I then run "apt-get install -f squeeze-backports xulrunner-5.0" I get:
The following packages have unmet dependencies:
 xulrunner-5.0 : Depends: libnss3-1d (>= 3.12.9~beta2) but
3.12.8-1+squeeze1 is to be installed
E: Broken packages

I am unable to get libnss3-1d updated to resolve this.

-- 
Tyler Ness