I then tried the 1/8 nightly and found that the Google CalDAV
calendars loaded correctly.
Could the fix for this bug, "Bug 439620 - Calendars without proper
provider deployment should be marked as "disabled"" (https://
bugzilla.mozilla.org/show_bug.cgi?id=439620), be causing this problem?
Thanks.
I suspect its rather a mozilla-central change. Anyway, I've fixed this
in bug 473053.
Philipp
Thanks.