Event Background Color Does Not Show Into Other Calendars

[paulp575]

I have just entered two different recurring events on one of my calendars.

When I change to another calendar, the event does show, but the background color does not show!

URL for calendar:http://www.dog-walker.us/4x4Calendar/plans.cgi?cal_start_month=0&cal_start_year=2007&cal_num_months=1&cal_id=57&display_type=0
Plans version: 7.8.4

Browser: Firefox v1.5.0.7
Operating system of the user: Win XP Pro w/SP2

ADDITIONAL INFORMATION:

Just added the following dates:

1 New Year's Day
2 Martin Luther King Jr's Birthday
3. Valentine's Day
4. President's Day

Holidays 1 and 3 did not list the first date in the Preview Dates screen.
Holidays 2 and 4 did list the first date in the Preview Dates screen.

So something very strange is going on!

Thanks,

paulp575