[R] Version Upgrade and Packages

[Rich Shepard]

   I just upgraded from 2.15.2 to 2.15.3 on our Slackware systems and see the
following when testing that the new version properly loads:

"The following object(s) are masked from 'package:stats':
     cor

"The following object(s) are masked from 'package:base':
     as.Date, as.Date.numeric"

   What, exactly, does this mean?

   Also, I assume that if I see no errors about loading packages that means
they do not need to be upgraded to work with this low level upgrade.

Rich