Until yesterday rvm had bugs with double slashes in paths when doing an automatic install of a specific ruby when you cd to a directory. Grab the latest off github if you need this fix.
Updating Bundler 1.0.10 may result in parse errors if your yaml contains symbols. See this post for details: https://rails.lighthouseapp.com/projects/8994/tickets/6354-psych-does-not-handle-symbols- and try this in your
require 'yaml' YAML::ENGINE.yamler= 'syck'
hovercss rule in WebKit may not play nicely with each other