There's a new version of the BashSupport plugin available now.
As usual, you can get the update using the plugin manager or at http://plugins.intellij.net/plugin/?idea&id=4230 .
- Now requires IDEA 9.0.3 or later
- Improved parser
- Fixed resolving of global variables
- Fixed new Bash script action if the extension .bash was used
- Improved variable resolving if definitions on different levels are present
- Implemented parsing of process substitution elements