Hi,

I attempted to tell icedove's iceowl extension (which was enabled in the
recent update) about my google calendar. This went fine until the
initial sync; I said "Dismiss all" to the first couple of windows
containing reminders, and then icedove stopped responding, eating 100%
CPU and slowly-growing quantities of RAM (it got up to 60% of my 16G of
RAM before I got fed up and killed it).

This is not very useful :(

Worse (and this is causing me to think maybe "important" isn't a high
enough severity), I can now not usefully recover from this, because each
time I re-start icedove, it goes back into trying to resync the
calendar, and I am unable to stop it doing so, so my icedove is not
entirely unuseable).

Regards,

Matthew