September 2010 events on Hub not visible in iCal 4.x in Snow Leopard

[Graham Perrin]

In one collection (Graham Perrin - CENTRIM):
* a timed event
* starts 10 September 2010 at 08:00
* ends 10 September 2010 at 18:00
* time zone Europe/London
* confirmed
* occurs weekdays
* ends 13 September 2010

In another collection (Graham Perrin - personal):
* an all-day event
* starts 10 September 2010
* confirmed
* occurs daily
* ends 13 September 2010
  -- a short vacation, long weekend, Friday to Monday.

Both events created in Chandler Desktop,
Chandler_intel-osx-leopard_1.0.4.dev-r16698-checkpoint20091016

Both events visible in Chandler Hub.

In iCal 4.x, supposedly synced with the Hub (refreshed): no trace of either event.

Any ideas? Should I file an interop bug report?

If you wish to view the first collection, the ticket is
https://hub.chandlerproject.org/pim/collection/761a2096-236b-11dd-a130-0016cb951098?ticket=p4tisok7c0 

[Graham Perrin]

Comparison: both events are visible in Sunbird 0.9,
Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.18pre) Gecko/20080917 Sunbird/0.9

[Graham Perrin]

Graham Perrin wrote:

… events visible in Chandler Hub.

In iCal 4.x, supposedly synced with the Hub (refreshed): no trace …

The problem is not limited to events in September 2010. I see now that

* all events recently added to the Hub (using Sunbird) are not visible in iCal; and

* iCal offers no alert, no warning that anything is missing.

I wonder whether <https://bugzilla.osafoundation.org/show_bug.cgi?id=12863> is a blocker.