Add notes on rvm_cd_complete_flag

content/support/troubleshooting.haml

@@ -146,3 +146,31 @@
 %pre.code
   :preserve
     PATH=/Users/wayne/.dbm/postgresql-8.4.0/bin:$PATH gem install pg --no-rdoc --no-ri
+
+%a{:href => "#", :name => "cd-completion"}
+%h2
+  I'm having trouble in Bash with tab completion of cd (and maybe $CDPATH)
+%p
+  rvm hooks into cd in order to do per-directory checks for '.rvmrc' files. Tab
+  completion of directories should still work, but some people have reported
+  problems. If tab completion was working %em before
+  you installed rvm and now it's not, you can enable cd completion from within
+  rvm itself.
+%p
+  Add the following to your ~/.bashrc or ~/.profile (~/.bash_profile) as
+  appropriate:
+%pre.code
+  export rvm_cd_complete_flag=1
+%p
+  If you have this problem, please report the details of your operating system,
+  $BASH_VERSION, the version of bash_completion you're using, etc. to #rvm on
+  Freenode or on Github. To be honest, the tab completion for cd in
+  bash_completion is far more robust than the code in rvm's cd function, and
+  %em should
+  still work with rvm. (In fact, it %em does
+  still work on OSX 10.6 with Bash 3.2 and Bash 4, on OpenBSD 4.7 with Bash
+  4 and on Debian 5.0.6 with Bash 3.2. All of those were tested with the
+  %a{:href => "http://bash-completion.alioth.debian.org/"} most up-to-date bash-completion
+  . If you don't have that, you may want to try it.)
+  Nevertheless, some people have reported problems, and the cd completion
+  inside rvm has helped them.