Merge branch 'double-check-after-start' of /home/git/repositories/gitlab/gitlabhq

diff --cc doc/install/installation.md
index e770cf2,73d0b90..2b3e400
--- 1/doc/install/installation.md
--- 2/doc/install/installation.md
+++ b/doc/install/installation.md
@@@ -12,9 -4,9 +12,9 @@@ This installation guide was created fo
  
  This is the official installation guide to set up a production server. To set up a **development installation** or for many other installation options please consult [the installation section in the readme](https://github.com/gitlabhq/gitlabhq#installation).
  
- The following steps have been known to work. Please **use caution when you deviate** from this guide. Make sure you don't violate any assumptions GitLab makes about its environment.
+ The following steps have been known to work. Please **use caution when you deviate** from this guide. Make sure you don't violate any assumptions GitLab makes about its environment. For example many people run into permission problems because they changed the location of directories or run services as the wrong user.
  
 -If you find a bug/error in this guide please **submit a pull request** following the [`contributing guide`](../../CONTRIBUTING.md).
 +If you find a bug/error in this guide please **submit a pull request** following the [contributing guide](../../CONTRIBUTING.md).
  
  - - -