Comment 7 for bug 320618

To recreate: start with no .mozilla/sunbird directory. Subscribe to a remote ICS calendar with an http:// URL. Add a new event to the calendar. This produces the following error:

"There has been an error reading data for calendar: basic. It has been placed in read-only mode, since changes to this calendar will likely result in data-loss. You may change this setting by choosing 'Edit Calendar'.

Error number: 0x0
Description: Publishing the calendar file failed
Status code: 404: Not Found"

Event appears on calendar until Sunbird is restarted and cannot be deleted or manipulated (e.g. moved to another calendar). When Sunbird is restarted, the event is gone (i.e. restarting Sunbird is a workaround to this bug). Once error is produced for the first time, the remote calendar will not be available when adding additional events.

Expected result would be to disallow adding events to read-only remote calendars from the start.

Source package 0.7+nobinonly-0ubuntu2

#~$ lsb_release -rd
Description: Ubuntu 8.04.1
Release: 8.04