iCal problem - FREQ not recognized?

I'm working on a web calendaring system using Lasso and just stumbled  
over a problem concerning repeating events. It seems like the  
frequency (FREQ) of the repetition is not shown in Lasso, for whatever  
reason...

Consider the following calendar event and the output in Lasso using  
$calendar->Attributes:

BEGIN:VEVENT
SEQUENCE:23
TRANSP:TRANSPARENT
UID:D168227F-E1C8-4AEB-9C99-7631F429419D
DTSTART;VALUE=DATE:20061116
DTSTAMP:20080526T085529Z
SUMMARY:Avdelingsmøte
EXDATE;VALUE=DATE:20080320
EXDATE;VALUE=DATE:20070712
EXDATE;VALUE=DATE:20070705
EXDATE;VALUE=DATE:20061228
EXDATE;VALUE=DATE:20071213
EXDATE;VALUE=DATE:20071004
EXDATE;VALUE=DATE:20070315
EXDATE;VALUE=DATE:20080508
EXDATE;VALUE=DATE:20070222
EXDATE;VALUE=DATE:20080424
EXDATE;VALUE=DATE:20070412
EXDATE;VALUE=DATE:20080529
EXDATE;VALUE=DATE:20071122
EXDATE;VALUE=DATE:20070726
CREATED:20090102T132445Z
DTEND;VALUE=DATE:20061117
RRULE:FREQ=WEEKLY;INTERVAL=1;UNTIL=20080604
END:VEVENT

Gives (as an array, formattet a little for clarity):


(SEQUENCE:23 ),
(TRANSP:TRANSPARENT ),
(UID:D168227F-E1C8-4AEB-9C99-7631F429419D ),
(DTSTART;VALUE=DATE:20061116 ),
(DTSTAMP:20080526T085529Z ),
(SUMMARY:Avdelingsmøte ),
(EXDATE;VALUE=DATE:20080320 ),
(EXDATE;VALUE=DATE:20070726 ),
(EXDATE;VALUE=DATE:20070705 ),
(EXDATE;VALUE=DATE:20070222 ),
(EXDATE;VALUE=DATE:20070412 ),
(EXDATE;VALUE=DATE:20080508 ),
(EXDATE;VALUE=DATE:20070712 ),
(EXDATE;VALUE=DATE:20070315 ),
(EXDATE;VALUE=DATE:20061228 ),
(EXDATE;VALUE=DATE:20080529 ),
(EXDATE;VALUE=DATE:20080424 ),
(EXDATE;VALUE=DATE:20071004 ),
(EXDATE;VALUE=DATE:20071122 ),
(EXDATE;VALUE=DATE:20071213 ),
(CREATED:20080911T092313Z ),
(DTEND;VALUE=DATE:20061117 ),
(RRULE:FREQ=;INTERVAL=1;UNTIL=20080604 )

"WEEKLY" is totally missing from the RRULE. Lasso bug? Can't see any  
logical reason why it should magically disappear from a string of data  
pulled from the iCal file. Am I doing something strange here?

I'm running Lasso 8.5.6 on Mac OS X 10.5.7/server 10.5.6.


Jon
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