Symptoms

After upgrading to Bamboo 5.0 or Bamboo 5.0.1, the text area which holds the inline scripts is hidden and it's not possible to edit the inline script tasks. The issue can be replicated in IE, Firefox, Chrome and Safari for new and existing script tasks. 

Cause

This problem is caused by ace in-compatibility. 

Resolution

1. Stop Bamboo, blow <bamboo-home>/caches and <bamboo-home>/temp directories and clear the browser cache, now start bamboo again and check if you still see the same problem.
2. If the issue still exists, stop Bamboo again and replace the "mode-powershell.js" file under <bamboo-installation-directory>/webapp/scripts/ace/ace with the file attached to this page: mode-powershell.js. The file is missing a ";", so another option is editing the mode-powershell.js that currently exists under <bamboo-installation-directory>/webapp/scripts/ace/ace, after stopping Bamboo, and adding ";" to the end of the file.