I'm just getting started with Android app development on a Mac, and I keep getting a NullPointerException everytime I go into Strings.xml to edit it.

Here's the steps I followed -

* Downloaded eclipse 3.5
* Installed the Android SDK
* Downloaded SDKs from Android SDK manager.
* Created a basic Hello World Project.

The project compiles and runs fine, but if I add even a single character to Strings.xml, a popup comes up that says -

"An error has occured. Please see the log for details.  

An error has occured. Please see the log for details."

When I click details, all I see is - "An error has occurred. See error log for more details.
java.lang.NullPointerException"

Anything I'm missing completely?