Android Properties Window

If I right click on my project and select properties. Then select android properties on the left side of the screen I am given a window where I can change project build target or add a library. The problem is none of my changes appear to be "sticking" in this screen when I hit apply or ok.

For example I go into the screen to add a library project:

Then I hit apply, then ok. When开发者_StackOverflow社区 I go back into the screen none of my changes have been applied:

This is a problem because I want to reference a library project in my main project. Whenever I try to reference one of the classes in my library project from my main project I get a class not found exception. Also whenever I run my project it says the libray-project.apk is not found in the console window?

Any suggestions or is this possibly a bug in eclipse or the android tools?

This bug has been reported here: http://code.google.com/p/android/issues/detail?id=17673&colspec=ID%20Type%20Status%20Owner%20Summary%20Stars

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Check that default.properties file is not read-only. This file is located in root folder of your Android project.

UPDATE: I actually tried making this file read-only and can see exactly the same behavior, but on Ubuntu. Don't have access to Windows machine now. This should probably be reported as bug.