R.app Package Manager Bug?

When I select 'Package Manager' from the 'Packages & Data' menu in R.app nothing happens and I get the following in the R Console window:

Error: '.find.package' is defunct.
Use 'find.package' instead.
See help("Defunct")

Is this a known problem or do I have something messed up?

Thanks,
Neil

Just upgraded to 3.1.0.

sessionInfo()

R version 3.1.0 (2014-04-10)
Platform: x86_64-apple-darwin10.8.0 (64-bit)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utile     datasets  methods   base