Android OpenGL ES Framebuffer objects - rendering to texture

Question

I am using an Android device running Froyo supporting OpenGL ES 1.1 and OpenGL ES 2.0

I want to render the depth buffer to a texture. Having seen a number of examples for OpenGL, OpenGL ES on other platforms (including iPhone) I have tried a number of FBO configurations.

I seem to be able to get an FBO set-up with a colour texture but every time I attach a depth texture it fails.

My current code is based on this example but creating a colour texture as well instead of setting draw and read buffers to none.

Is there a simple example of configuring an OpenGL ES FBO on Android to render depth to a texture? Alternatively is there a document describing what is and is not supported?