If your application is still within the processing time do not worry.

In our case CEM received my passport April 2011 but they only started processing January 2012. It's 8 months after!!
So don't worry to much...

If in case you think your application already pass the processing time I suggest that you request a GCMS notes from immigration. GCMS notes is somewhat a snapshot summary status of our application. All the notes or comments of the VO regarding the application is included I the GCMS notes. It also shows the latest status of the application stage by stage.
If you're still worried, you can also ask the help of your MP to inquire the status of your application. In our case after we asked the help of our mp CEM called us two weeks after.
I hope this helps..

Good luck!!