[R] ubuntu system refuses to update packages

[Alan Jackson]

There must be a simple answer to this.

I'm running ubuntu gutsy, currently have 2.7.2 loaded, but the update
tools refuse to update it, and don't tell me why. With apt-get I get :

[668 ~]$ sudo apt-get -u -V --simulate dist-upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
   r-base (2.7.2-1gutsy0 => 2.8.0-1gutsy1)
   r-base-core (2.7.2-1gutsy0 => 2.8.0-1gutsy1)
   r-base-dev (2.7.2-1gutsy0 => 2.8.0-1gutsy1)
   r-cran-rpart (3.1.41-1gutsy0 => 3.1.42-1gutsy0)
   r-recommended (2.7.2-1gutsy0 => 2.8.0-1gutsy1)
0 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.

If I use a gui package manager, it tells me the update will break
the installation and refuses to go forward, but doesn't show what the
issue is.

-- 
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| Alan K. Jackson            | To see a World in a Grain of Sand      |
| alan at ajackson.org          | And a Heaven in a Wild Flower,         |
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