I got this when updating gems.
$ sudo gem up
Upgrading installed gems…
Attempting remote upgrade of rmagick
Attempting remote installation of ‘rmagick’
ERROR: While executing gem … (OpenURI::HTTPError)
300 Multiple Choices
I found a few similar problem reports on this list,
which seemed to be caused by rubyforge’s gem mirroring systems.
Having some break time can shoot sort of those problems?