None of the methods of the registered IIOWriteProgressListener get called whenever a write process is in progress.

How to reproduce the bug :

Run the sample code. You would find a frame with two load buttons.
Click loadJPEG button. Check the command prompt for the messages.
If you get messages like 'image started', 'image completed' and 'progress' then the feature is working fine. If you get just 'writing jpg image' and 'writing over' then the bug is reproduced.
Click loadPNG and repeat the above procedure.

The following files are attached for testing.

Source File: WriteListenerTest.java
Resource File: palette.png, trees2.jpg