User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; Avant Browser; Avant Browser; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 1.1.4322) Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2.11) Gecko/20101013 Lightning/1.0b2 Thunderbird/3.1.5 When using the Calendar View, I cannot navigate the calendar with the navigation keys on the keyboard (page U/D, arrows U/D/L/R). Have tried combining with Ctrl, Alt or Shift but wothout effect. Only way to navigate is using the mouse. Reproducible: Always Steps to Reproduce: 1. Switch to Calendar View 2. Try moving around using the keyboard navigation keys. Actual Results: The [pale yellow] day highlight does not move, cannot pan months or years. I have tried all possible views 'Day', 'Week', 'Multiweek' and 'Month' without result. Sometimes the arrow Up/Down does move the window up down scrolling to pre- or post-working hours but as soon as you hit the top/bottom, it stops working. Expected Results: I expect to be able to move the highlight in the Calendar View and pan days, months, etc. Win XP Pro SP3.