Here are the 4 steps to configure your Blackberry Device for the mobileGCAL application.
1]Select you Blackberry Browser from the main menu.

2]Depress the thumbwheel and select "Options".

3]Select "Browser Configuration".

4]With the Space Bar select "Support HTML Tables", "Use Foreground and Background Colors" and finally "Support Style Sheets" (media type=handheld).

Your Blackberry is now configured to use mobileGCAL. Enjoy!